|
|
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|
|
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| Year |
Number of counties |
# of birds |
# of sera |
# + EEE | # + SLE | #+WN |
| 1988 | 23 | 0 | 669 | 4 | 6 |
0
|
| 1989 | 18 | na0 | 768 | 2 | 81 |
0
|
| 1990 | 22 | 1062 | 2460 | 2 | 407 |
0
|
| 1991 | 21 | 794 | 1848 | 15 | 23 |
0
|
| 1992 | 21 | 881 | 2426 | 8 | 2 |
0
|
| 1993 | 21 | 844 | 1799 | 1 | 100 |
0
|
| 1994 | 21 | 904 | 2056 | 6 | 31 |
0
|
| 1995 | 28 | 1017 | 2692 | 5 | 25 |
0
|
| 1996 | 28 | 1048 | 3397 | 10 | 7 |
0
|
| 1997 | 22 | 1002 | 2822 | 2 | 269 |
0
|
| 1998 | 27 | 1112 | 2744 | 4 | 84 |
0
|
| 1999 | 27 | 1062 | 2882 | 6 | 100 |
0
|
| 2000 | 27 | 1104 | 2931 | 2 | 80 |
0
|
| 2001 |
31
|
1142
|
3754
|
7
|
0
|
76
|
| Average (1988-2001) | 5.3 | 86.8 | ||||
| Median (1988-2001) | 4.5 | 55.5 | ||||