| Year | Ringed | Retrapped | Recovered | No. of Species |
|---|---|---|---|---|
| 1948 | 8 | 1 | 0 | 4 |
| 1949 | 11 | 1 | 4 | 6 |
| 1950 | 1357 | 0 | 5 | 59 |
| 1951 | 1021 | 3 | 21 | 77 |
| 1952 | 3218 | 3 | 36 | 116 |
| 1953 | 7078 | 8 | 56 | 141 |
| 1954 | 11015 | 7 | 265 | 132 |
| 1955 | 19476 | 4 | 184 | 144 |
| 1956 | 12448 | 23 | 270 | 169 |
| 1957 | 8208 | 29 | 248 | 165 |
| 1958 | 7921 | 4 | 226 | 163 |
| 1959 | 7162 | 41 | 252 | 207 |
| 1960 | 4828 | 23 | 186 | 178 |
| 1961 | 2145 | 10 | 154 | 147 |
| 1962 | 2287 | 20 | 205 | 161 |
| 1963 | 2608 | 31 | 231 | 172 |
| 1964 | 2268 | 30 | 394 | 148 |
| 1965 | 3378 | 34 | 445 | 164 |
| 1966 | 1592 | 127 | 342 | 154 |
| 1967 | 11744 | 147 | 362 | 194 |
| 1968 | 8809 | 159 | 777 | 255 |
| 1969 | 22467 | 81 | 651 | 338 |
| 1970 | 37343 | 88 | 742 | 418 |
| 1971 | 45741 | 113 | 846 | 412 |
| 1972 | 44181 | 259 | 1130 | 444 |
| 1973 | 44668 | 573 | 1229 | 443 |
| 1974 | 31640 | 348 | 785 | 440 |
| 1975 | 28449 | 407 | 829 | 447 |
| 1976 | 15974 | 386 | 353 | 363 |
| 1977 | 15459 | 452 | 354 | 372 |
| 1978 | 11268 | 809 | 250 | 363 |
| 1979 | 9896 | 845 | 229 | 362 |
| 1980 | 16470 | 835 | 335 | 357 |
| 1981 | 15054 | 862 | 334 | 358 |
| 1982 | 17944 | 1384 | 352 | 395 |
| 1983 | 25095 | 1568 | 539 | 385 |
| 1984 | 22309 | 2629 | 408 | 408 |
| 1985 | 19832 | 1709 | 300 | 445 |
| 1986 | 19286 | 2462 | 358 | 449 |
| 1987 | 23643 | 1962 | 296 | 474 |
| 1988 | 28129 | 2161 | 372 | 471 |
| 1989 | 36285 | 1703 | 332 | 512 |
| 1990 | 32380 | 2385 | 325 | 535 |
| 1991 | 29518 | 2396 | 318 | 480 |
| 1992 | 45274 | 2398 | 402 | 524 |
| 1993 | 54908 | 2874 | 383 | 507 |
| 1994 | 62374 | 4101 | 418 | 531 |
| 1995 | 55371 | 4526 | 354 | 528 |
| 1996 | 54424 | 3521 | 329 | 524 |
| 1997 | 57063 | 3756 | 392 | 546 |
| 1998 | 59699 | 5280 | 458 | 547 |
| 1999 | 77125 | 6710 | 402 | 577 |
| 2000 | 64130 | 7201 | 443 | 569 |
| 2001 | 66023 | 5219 | 325 | 593 |
| 2002 | 76251 | 7675 | 460 | 614 |
| 2003 | 89339 | 6025 | 439 | 727 |
| 2004 | 75033 | 5386 | 319 | 764 |
| 2005 | 82513 | 7017 | 421 | 769 |
| 2006 | 70055 | 5863 | 308 | 695 |
| 2007 | 72607 | 5729 | 307 | 729 |
| 2008 | 75190 | 5675 | 255 | 779 |
| 2009 | 74704 | 7046 | 334 | 737 |
| 2010 | 83790 | 8628 | 289 | 875 |
| 2011 | 67694 | 9034 | 285 | 837 |
| 2012 | 59118 | 9200 | 242 | 821 |
| 2013 | 59059 | 7882 | 309 | 743 |
| 2014 | 63940 | 7734 | 480 | 813 |
| 2015 | 56718 | 8779 | 337 | 720 |
| 2016 | 59373 | 10237 | 578 | 738 |
| 2017 | 55838 | 10292 | 545 | 731 |
| 2018 | 49383 | 8172 | 409 | 787 |
| 2019 | 49987 | 6204 | 424 | 808 |
| 2020 | 40233 | 4208 | 317 | 630 |
| 2021 | 40397 | 4109 | 407 | 625 |
| 2022 | 38031 | 3973 | 196 | 747 |
| 2023 | 44748 | 4361 | 182 | 626 |
| 2024 | 22964 | 2031 | 86 | 501 |
Totals: | 2714969 | 227968 | 28165 | |
