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) |
1951
( 347 )
|
|
|
|
13%
|
< 1%
|
16%
|
16%
|
21%
|
30%
|
1%
|
|
|
|
1952
( 232 )
|
|
|
|
|
|
28%
|
15%
|
38%
|
13%
|
3%
|
|
|
|
1953
( 313 )
|
|
|
|
|
3%
|
21%
|
52%
|
13%
|
9%
|
|
|
|
|
1954
( 217 )
|
|
|
|
1%
|
20%
|
|
|
35%
|
38%
|
|
3%
|
|
|
1955
( 183 )
|
4%
|
6%
|
|
6%
|
6%
|
|
5%
|
31%
|
9%
|
|
29%
|
|
|
1956
( 161 )
|
|
|
|
|
|
|
9%
|
60%
|
8%
|
13%
|
7%
|
|
|
1957
( 232 )
|
6%
|
11%
|
8%
|
|
|
|
6%
|
49%
|
4%
|
7%
|
6%
|
|
|
1958
( 361 )
|
|
6%
|
11%
|
|
6%
|
5%
|
6%
|
33%
|
9%
|
11%
|
8%
|
|
|
1959
( 534 )
|
|
|
|
|
19%
|
15%
|
25%
|
31%
|
|
3%
|
4%
|
|
|
1960
( 497 )
|
|
|
3%
|
14%
|
11%
|
18%
|
8%
|
27%
|
3%
|
4%
|
7%
|
|
|
1961
( 267 )
|
|
|
|
14%
|
10%
|
25%
|
22%
|
8%
|
8%
|
4%
|
2%
|
4%
|
|
1962
( 281 )
|
|
|
|
13%
|
6%
|
14%
|
18%
|
1%
|
5%
|
9%
|
30%
|
|
|
1963
( 407 )
|
|
|
|
7%
|
9%
|
5%
|
15%
|
< 1%
|
19%
|
12%
|
17%
|
12%
|
|
1964
( 508 )
|
10%
|
11%
|
5%
|
9%
|
11%
|
7%
|
12%
|
11%
|
3%
|
9%
|
2%
|
6%
|
|
1965
( 506 )
|
4%
|
4%
|
2%
|
4%
|
6%
|
8%
|
16%
|
20%
|
10%
|
7%
|
9%
|
4%
|
|
1966
( 551 )
|
3%
|
3%
|
2%
|
2%
|
1%
|
5%
|
23%
|
17%
|
9%
|
17%
|
8%
|
3%
|
|
1967
( 620 )
|
2%
|
2%
|
< 1%
|
5%
|
7%
|
7%
|
21%
|
14%
|
10%
|
12%
|
7%
|
6%
|
|
1968
( 286 )
|
3%
|
3%
|
3%
|
|
19%
|
8%
|
8%
|
17%
|
23%
|
10%
|
2%
|
|
|
1969
( 299 )
|
|
|
3%
|
17%
|
15%
|
6%
|
18%
|
6%
|
13%
|
4%
|
11%
|
4%
|
|
1970
( 289 )
|
6%
|
4%
|
1%
|
2%
|
8%
|
|
32%
|
8%
|
20%
|
6%
|
4%
|
3%
|
|
1971
( 382 )
|
6%
|
7%
|
2%
|
2%
|
21%
|
4%
|
29%
|
11%
|
1%
|
7%
|
1%
|
3%
|
|
1972
( 508 )
|
|
|
|
3%
|
30%
|
11%
|
10%
|
5%
|
13%
|
4%
|
15%
|
4%
|
|
1973
( 602 )
|
|
|
|
1%
|
33%
|
16%
|
10%
|
3%
|
4%
|
9%
|
9%
|
11%
|
|
1974
( 238 )
|
< 1%
|
13%
|
10%
|
|
25%
|
6%
|
2%
|
13%
|
12%
|
2%
|
11%
|
|
|
1975
( 233 )
|
9%
|
|
|
|
26%
|
8%
|
1%
|
10%
|
9%
|
4%
|
20%
|
10%
|
|
1976
( 579 )
|
|
2%
|
14%
|
|
6%
|
8%
|
25%
|
16%
|
13%
|
7%
|
3%
|
|
|
1977
( 467 )
|
2%
|
2%
|
18%
|
|
28%
|
10%
|
|
6%
|
7%
|
1%
|
17%
|
2%
|
|
1978
( 543 )
|
< 1%
|
11%
|
6%
|
< 1%
|
17%
|
5%
|
13%
|
8%
|
9%
|
5%
|
17%
|
2%
|
|
1979
( 510 )
|
3%
|
2%
|
5%
|
7%
|
20%
|
16%
|
7%
|
11%
|
11%
|
7%
|
3%
|
3%
|
|
1980
( 407 )
|
5%
|
24%
|
17%
|
1%
|
14%
|
6%
|
10%
|
4%
|
7%
|
|
7%
|
|
|
1981
( 325 )
|
3%
|
9%
|
1%
|
5%
|
29%
|
8%
|
9%
|
8%
|
6%
|
7%
|
6%
|
2%
|
|
1982
( 394 )
|
1%
|
19%
|
2%
|
6%
|
12%
|
3%
|
10%
|
9%
|
19%
|
8%
|
3%
|
3%
|
|
1983
( 755 )
|
3%
|
5%
|
3%
|
5%
|
16%
|
19%
|
12%
|
10%
|
7%
|
4%
|
7%
|
3%
|
|
1984
( 491 )
|
5%
|
9%
|
7%
|
4%
|
15%
|
17%
|
16%
|
10%
|
1%
|
3%
|
3%
|
4%
|
|
1985
( 568 )
|
1%
|
4%
|
3%
|
|
10%
|
16%
|
2%
|
22%
|
6%
|
17%
|
14%
|
1%
|
|
1986
( 701 )
|
6%
|
2%
|
6%
|
1%
|
8%
|
14%
|
6%
|
13%
|
25%
|
3%
|
6%
|
2%
|
|
1987
( 653 )
|
5%
|
5%
|
6%
|
9%
|
12%
|
19%
|
7%
|
9%
|
11%
|
9%
|
1%
|
2%
|
|
1988
( 675 )
|
5%
|
2%
|
6%
|
2%
|
12%
|
14%
|
8%
|
12%
|
13%
|
12%
|
7%
|
1%
|
|
1989
( 345 )
|
14%
|
1%
|
10%
|
6%
|
23%
|
20%
|
11%
|
3%
|
4%
|
2%
|
1%
|
1%
|
|
1990
( 321 )
|
8%
|
4%
|
14%
|
6%
|
11%
|
24%
|
14%
|
4%
|
|
7%
|
1%
|
1%
|
|
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.
|