TEMPORAL SAMPLING COVERAGE
Distribution of Net Tows by Year and by Month.
|
|
Year
( n )
|
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Jul
|
Aug
|
Sep
|
Oct
|
Nov
|
Dec
|
Coverage Maps (click to zoom) |
1913
( 6 )
|
|
|
|
|
|
|
|
16%
|
83%
|
|
|
|
|
1914
( 5 )
|
|
|
|
|
|
|
|
|
100%
|
|
|
|
|
1915
( 9 )
|
|
|
|
|
|
|
11%
|
88%
|
|
|
|
|
|
1916
( 0 )
|
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|
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|
|
No data. |
1917
( 0 )
|
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No data. |
1918
( 0 )
|
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No data. |
1919
( 0 )
|
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No data. |
1920
( 0 )
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No data. |
1921
( 0 )
|
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No data. |
1922
( 0 )
|
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|
No data. |
1923
( 0 )
|
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No data. |
1924
( 0 )
|
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No data. |
1925
( 0 )
|
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|
|
No data. |
1926
( 0 )
|
|
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|
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|
|
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|
|
|
|
No data. |
1927
( 0 )
|
|
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|
|
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|
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|
|
|
|
No data. |
1928
( 0 )
|
|
|
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|
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|
|
No data. |
1929
( 0 )
|
|
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|
|
No data. |
1930
( 20 )
|
|
|
|
|
|
|
|
55%
|
45%
|
|
|
|
|
1931
( 15 )
|
|
|
|
|
|
|
|
|
100%
|
|
|
|
|
1932
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1933
( 0 )
|
|
|
|
|
|
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|
|
No data. |
1934
( 0 )
|
|
|
|
|
|
|
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|
|
No data. |
1935
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1936
( 51 )
|
|
|
|
|
|
|
|
64%
|
25%
|
9%
|
|
|
|
1937
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1938
( 1 )
|
|
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|
|
|
100%
|
|
|
|
|
|
|
1939
( 10 )
|
|
|
|
|
|
20%
|
20%
|
20%
|
20%
|
20%
|
|
|
|
1940
( 0 )
|
|
|
|
|
|
|
|
|
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|
No data. |
1941
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1942
( 0 )
|
|
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|
No data. |
1943
( 0 )
|
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|
No data. |
1944
( 0 )
|
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|
No data. |
1945
( 0 )
|
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|
No data. |
1946
( 0 )
|
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|
|
No data. |
1947
( 0 )
|
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|
No data. |
1948
( 0 )
|
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|
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|
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|
No data. |
1949
( 0 )
|
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|
|
No data. |
1950
( 0 )
|
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|
No data. |
1951
( 0 )
|
|
|
|
|
|
|
|
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|
No data. |
1952
( 20 )
|
|
|
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|
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|
|
|
60%
|
40%
|
|
|
1953
( 200 )
|
1%
|
7%
|
8%
|
27%
|
3%
|
|
13%
|
7%
|
10%
|
7%
|
8%
|
6%
|
|
1954
( 252 )
|
1%
|
|
8%
|
6%
|
8%
|
15%
|
8%
|
3%
|
18%
|
9%
|
2%
|
16%
|
|
1955
( 292 )
|
1%
|
16%
|
1%
|
21%
|
8%
|
14%
|
14%
|
4%
|
9%
|
4%
|
|
2%
|
|
1956
( 342 )
|
7%
|
4%
|
9%
|
4%
|
7%
|
1%
|
16%
|
12%
|
9%
|
12%
|
9%
|
5%
|
|
1957
( 353 )
|
6%
|
7%
|
6%
|
18%
|
18%
|
5%
|
9%
|
16%
|
< 1%
|
7%
|
2%
|
1%
|
|
1958
( 258 )
|
9%
|
7%
|
|
6%
|
28%
|
12%
|
16%
|
14%
|
|
2%
|
|
2%
|
|
1959
( 476 )
|
6%
|
5%
|
|
22%
|
9%
|
12%
|
5%
|
8%
|
16%
|
12%
|
|
|
|
1960
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1961
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1962
( 50 )
|
|
|
|
|
|
|
|
|
|
100%
|
|
|
|
1963
( 44 )
|
|
|
|
|
|
|
22%
|
77%
|
|
|
|
|
|
1964
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1965
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1966
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1967
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1968
( 41 )
|
|
|
17%
|
29%
|
19%
|
19%
|
14%
|
|
|
|
|
|
|
1969
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1970
( 184 )
|
|
|
1%
|
11%
|
16%
|
15%
|
15%
|
11%
|
11%
|
14%
|
< 1%
|
|
|
1971
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1972
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1973
( 38 )
|
|
|
|
|
|
|
68%
|
31%
|
|
|
|
|
|
1974
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1975
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1976
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1977
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1978
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1979
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1980
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1981
( 28 )
|
|
|
|
|
|
|
|
14%
|
85%
|
|
|
|
|
1982
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1983
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1984
( 14 )
|
|
|
|
|
|
|
28%
|
|
|
|
|
71%
|
|
1985
( 49 )
|
|
|
|
32%
|
|
|
|
|
|
|
24%
|
42%
|
|
1986
( 83 )
|
|
16%
|
7%
|
9%
|
27%
|
34%
|
3%
|
|
|
|
|
|
|
1987
( 30 )
|
6%
|
10%
|
16%
|
16%
|
13%
|
10%
|
13%
|
13%
|
|
|
|
|
|
1988
( 60 )
|
|
|
31%
|
35%
|
5%
|
|
|
28%
|
|
|
|
|
|
1989
( 83 )
|
13%
|
2%
|
3%
|
2%
|
4%
|
20%
|
22%
|
27%
|
2%
|
|
|
|
|
1990
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1991
( 86 )
|
|
|
|
|
|
13%
|
20%
|
59%
|
5%
|
|
|
|
|
1992
( 39 )
|
|
38%
|
|
|
|
|
25%
|
|
35%
|
|
|
|
|
1993
( 90 )
|
|
|
|
|
|
40%
|
33%
|
5%
|
21%
|
|
|
|
|
1994
( 39 )
|
|
|
|
|
|
28%
|
51%
|
20%
|
|
|
|
|
|
1995
( 28 )
|
|
|
|
|
53%
|
|
|
46%
|
|
|
|
|
|
1996
( 73 )
|
|
|
|
32%
|
21%
|
|
21%
|
23%
|
|
|
|
|
|
1997
( 56 )
|
|
|
|
66%
|
23%
|
|
10%
|
|
|
|
|
|
|
1998
( 92 )
|
|
33%
|
|
29%
|
4%
|
4%
|
|
|
|
28%
|
|
|
|
1999
( 81 )
|
|
35%
|
28%
|
|
|
|
|
18%
|
17%
|
|
|
|
|
The values in each "Month Column" represent the percentage of that year's total data amount that was sampled in that specific month.
Empty cells indicate that no data were present for that month of that year.
|