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
( 1373 )
|
9%
|
7%
|
9%
|
10%
|
9%
|
12%
|
7%
|
10%
|
8%
|
6%
|
6%
|
3%
|
|
1952
( 1492 )
|
6%
|
7%
|
9%
|
11%
|
12%
|
15%
|
11%
|
7%
|
6%
|
5%
|
6%
|
|
|
1953
( 1435 )
|
6%
|
6%
|
9%
|
16%
|
14%
|
13%
|
8%
|
8%
|
2%
|
4%
|
1%
|
5%
|
|
1954
( 1473 )
|
9%
|
7%
|
10%
|
12%
|
14%
|
14%
|
8%
|
3%
|
4%
|
7%
|
|
7%
|
|
1955
( 1312 )
|
8%
|
8%
|
10%
|
12%
|
9%
|
18%
|
14%
|
|
|
8%
|
|
8%
|
|
1956
( 1408 )
|
7%
|
9%
|
9%
|
12%
|
18%
|
13%
|
14%
|
2%
|
3%
|
3%
|
1%
|
2%
|
|
1957
( 1490 )
|
3%
|
9%
|
8%
|
13%
|
13%
|
17%
|
13%
|
3%
|
2%
|
7%
|
5%
|
1%
|
|
1958
( 1884 )
|
7%
|
7%
|
8%
|
14%
|
12%
|
11%
|
14%
|
1%
|
4%
|
12%
|
3%
|
2%
|
|
1959
( 2182 )
|
11%
|
8%
|
6%
|
11%
|
11%
|
9%
|
11%
|
11%
|
3%
|
10%
|
1%
|
1%
|
|
1960
( 1814 )
|
14%
|
11%
|
10%
|
17%
|
8%
|
10%
|
8%
|
7%
|
4%
|
7%
|
|
|
|
1961
( 953 )
|
7%
|
16%
|
|
13%
|
11%
|
< 1%
|
23%
|
< 1%
|
|
16%
|
9%
|
|
|
1962
( 918 )
|
5%
|
20%
|
4%
|
22%
|
< 1%
|
|
16%
|
3%
|
|
17%
|
8%
|
|
|
1963
( 1010 )
|
5%
|
21%
|
|
20%
|
9%
|
|
15%
|
6%
|
|
21%
|
|
|
|
1964
( 1200 )
|
9%
|
20%
|
< 1%
|
21%
|
1%
|
8%
|
17%
|
2%
|
|
17%
|
< 1%
|
|
|
1965
( 1094 )
|
13%
|
14%
|
< 1%
|
25%
|
|
8%
|
13%
|
5%
|
17%
|
|
|
|
|
1966
( 1979 )
|
7%
|
8%
|
4%
|
9%
|
10%
|
6%
|
12%
|
8%
|
6%
|
11%
|
4%
|
10%
|
|
1967
( 258 )
|
|
|
|
|
|
17%
|
48%
|
|
|
|
|
34%
|
|
1968
( 319 )
|
39%
|
|
|
6%
|
11%
|
41%
|
|
|
|
|
|
|
|
1969
( 1725 )
|
11%
|
13%
|
3%
|
9%
|
5%
|
6%
|
12%
|
3%
|
6%
|
11%
|
6%
|
8%
|
|
1970
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1971
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1972
( 1503 )
|
12%
|
21%
|
17%
|
3%
|
9%
|
4%
|
15%
|
|
1%
|
8%
|
6%
|
|
|
1973
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1974
( 272 )
|
|
|
|
|
|
|
|
|
|
|
20%
|
79%
|
|
1975
( 1392 )
|
13%
|
8%
|
18%
|
|
11%
|
9%
|
14%
|
|
|
16%
|
4%
|
3%
|
|
1976
( 0 )
|
|
|
|
|
|
|
|
|
|
|
|
|
No data. |
1977
( 101 )
|
|
|
|
|
|
|
|
|
|
|
6%
|
93%
|
|
1978
( 1201 )
|
19%
|
8%
|
9%
|
11%
|
8%
|
10%
|
13%
|
18%
|
|
|
|
|
|
1979
( 387 )
|
11%
|
24%
|
21%
|
15%
|
26%
|
|
|
|
|
|
|
|
|
1980
( 472 )
|
|
6%
|
24%
|
15%
|
11%
|
< 1%
|
|
|
|
|
5%
|
35%
|
|
1981
( 899 )
|
13%
|
8%
|
12%
|
32%
|
7%
|
9%
|
12%
|
4%
|
|
|
|
|
|
1982
( 214 )
|
14%
|
23%
|
28%
|
21%
|
|
|
|
|
|
|
|
10%
|
|
1983
( 177 )
|
|
14%
|
65%
|
20%
|
|
|
|
|
|
|
|
|
|
1984
( 918 )
|
16%
|
10%
|
8%
|
14%
|
6%
|
10%
|
17%
|
|
|
12%
|
3%
|
|
|
1985
( 503 )
|
|
7%
|
41%
|
5%
|
10%
|
|
|
11%
|
|
|
23%
|
|
|
1986
( 347 )
|
33%
|
14%
|
|
|
17%
|
|
|
|
15%
|
2%
|
16%
|
|
|
1987
( 316 )
|
8%
|
8%
|
19%
|
2%
|
20%
|
|
|
|
20%
|
|
19%
|
|
|
1988
( 336 )
|
16%
|
3%
|
11%
|
8%
|
12%
|
|
|
19%
|
|
19%
|
1%
|
6%
|
|
1989
( 316 )
|
15%
|
7%
|
14%
|
20%
|
< 1%
|
|
17%
|
2%
|
|
|
20%
|
|
|
1990
( 304 )
|
21%
|
|
19%
|
16%
|
|
|
8%
|
12%
|
|
|
21%
|
|
|
1991
( 331 )
|
18%
|
3%
|
24%
|
14%
|
|
|
9%
|
9%
|
3%
|
16%
|
|
|
|
1992
( 258 )
|
5%
|
18%
|
|
25%
|
|
|
25%
|
|
7%
|
17%
|
|
|
|
1993
( 263 )
|
25%
|
|
1%
|
23%
|
|
|
|
24%
|
|
25%
|
|
|
|
1994
( 352 )
|
11%
|
6%
|
10%
|
20%
|
13%
|
|
|
18%
|
|
18%
|
|
|
|
1995
( 251 )
|
25%
|
|
|
21%
|
|
|
26%
|
|
|
26%
|
|
|
|
1996
( 335 )
|
2%
|
17%
|
|
16%
|
1%
|
|
|
43%
|
|
17%
|
1%
|
|
|
1997
( 290 )
|
3%
|
21%
|
|
21%
|
|
|
22%
|
|
14%
|
13%
|
|
2%
|
|
1998
( 399 )
|
8%
|
7%
|
2%
|
21%
|
2%
|
5%
|
17%
|
5%
|
16%
|
4%
|
5%
|
3%
|
|
1999
( 266 )
|
24%
|
|
|
22%
|
|
|
1%
|
24%
|
|
24%
|
|
2%
|
|
2000
( 275 )
|
24%
|
|
|
24%
|
|
2%
|
22%
|
2%
|
|
23%
|
|
1%
|
|
2001
( 330 )
|
19%
|
|
|
19%
|
|
|
20%
|
3%
|
6%
|
13%
|
16%
|
1%
|
|
2002
( 342 )
|
8%
|
32%
|
4%
|
14%
|
|
|
19%
|
< 1%
|
|
< 1%
|
19%
|
|
|
2003
( 423 )
|
1%
|
39%
|
|
22%
|
|
|
14%
|
4%
|
|
11%
|
3%
|
1%
|
|
2004
( 461 )
|
22%
|
18%
|
7%
|
15%
|
|
|
16%
|
|
|
2%
|
17%
|
1%
|
|
2005
( 616 )
|
18%
|
18%
|
|
19%
|
< 1%
|
1%
|
16%
|
3%
|
3%
|
2%
|
14%
|
< 1%
|
|
2006
( 389 )
|
|
23%
|
|
34%
|
|
|
19%
|
1%
|
|
12%
|
6%
|
1%
|
|
2007
( 287 )
|
25%
|
1%
|
3%
|
20%
|
|
4%
|
21%
|
|
|
|
23%
|
|
|
2008
( 544 )
|
12%
|
|
4%
|
24%
|
|
|
12%
|
22%
|
3%
|
17%
|
3%
|
|
|
2009
( 379 )
|
19%
|
|
18%
|
13%
|
7%
|
|
19%
|
2%
|
|
|
18%
|
|
|
2010
( 421 )
|
16%
|
3%
|
< 1%
|
31%
|
11%
|
|
1%
|
16%
|
2%
|
3%
|
11%
|
|
|
2011
( 379 )
|
22%
|
4%
|
2%
|
32%
|
|
|
4%
|
14%
|
|
18%
|
1%
|
|
|
2012
( 439 )
|
4%
|
12%
|
7%
|
24%
|
|
1%
|
20%
|
12%
|
|
12%
|
5%
|
|
|
2013
( 342 )
|
25%
|
|
|
33%
|
3%
|
5%
|
25%
|
6%
|
|
|
|
|
|
2014
( 276 )
|
4%
|
7%
|
1%
|
41%
|
5%
|
1%
|
30%
|
6%
|
|
|
|
|
|
2015
( 125 )
|
|
|
|
98%
|
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.
|