| Year | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
| Nesting Attempts | 273 | 398 | 389 | 457 | 591 | 450 | 554 | 652 | 656 |
| Failed Attempts | 55 | 137 | 119 | 103 | 156 | 137 | 154 | 182 | 201 |
| % Successful | 80% | 66% | 69% | 77% | 74% | 70% | 72% | 72% | 69% |
| % Failed | 20% | 34% | 31% | 23% | 26% | 30% | 28% | 28% | 31% |
| Eggs Laid | 1342 | 1964 | 1941 | 2323 | 2990 | 2187 | 2806 | 3265 | 3269 |
| Eggs per Attempt | 4.9 | 4.9 | 5 | 5.1 | 5.1 | 4.9 | 5.1 | 5.0 | 5.0 |
| Young Hatched | 1115 | 1471 | 1480 | 1843 | 2409 | 1625 | 2146 | 2502 | 2429 |
| % Hatched | 83% | 75% | 76% | 79% | 81% | 74% | 77% | 77% | 74% |
| Young Banded | 939 | 1198 | 1299 | 1629 | 1952 | 1356 | 1837 | 2108 | 2048 |
| % Banded | 84% | 81% | 88% | 89% | 86% | 83% | 85% | 84% | 84% |
| Young Fledged | 972 | 1045 | 1159 | 1467 | 1715 | 1231 | 1639 | 1878 | 1773 |
| % Fledged | 87% | 71% | 78% | 80% | 71% | 76% | 76% | 75% | 73% |
| Available Boxes | 800 | 1114 | 1200 | 1544 | 1725 | 1780 | 1743 | 1683 | 1659 |
| Attempts as % of Available Boxes | 23% | 26% | 26% | 20% | 25% | 19% | 23% | 26% | 29% |
| Number of Monitors | 31 | 39 | 60 | 82 | 92 | 88 | 85 | 77 | 80 |