| Class Of | Class Base | Number of Donors | Participation | ||
|---|---|---|---|---|---|
| 1941 | 2 | 1 | 50.0% | ||
| 1942 | 3 | 1 | 33.3% | ||
| 1943 | 6 | 1 | 16.67% | ||
| 1944 | 8 | 1 | 12.5% | ||
| 1945 | 2 | 1 | 50.0% | ||
| 1946 | 1 | 1 | 100% | ||
| 1947 | 2 | 1 | 50.0% | ||
| 1948 | 9 | 2 | 22.2% | ||
| 1949 | 20 | 6 | 30.3% | ||
| 1950 | 33 | 9 | 27.27% | ||
| 1951 | 39 | 8 | 20.51% | ||
| 1952 | 33 | 8 | 24.24% | ||
| 1953 | 29 | 9 | 31.03% | ||
| 1954 | 34 | 14 | 41.18% | ||
| 1955 | 42 | 13 | 30.95% | ||
| 1956 | 66 | 24 | 36.36% | ||
| 1957 | 56 | 17 | 30.36% | ||
| 1958 | 67 | 19 | 28.36% | ||
| 1959 | 86 | 31 | 36.05% | ||
| 1960 | 95 | 31 | 32.63% | ||
| 1961 | 76 | 27 | 35.53% | ||
| 1962 | 97 | 28 | 28.87% | ||
| 1963 | 113 | 37 | 32.74% | ||
| 1964 | 151 | 31 | 20.53% | ||
| 1965 | 117 | 33 | 28.21% | ||
| 1966 | 146 | 32 | 21.92% | ||
| 1967 | 126 | 29 | 23.02% | ||
| 1968 | 174 | 90 | 51.72% | ||
| 1969 | 145 | 33 | 22.76% | ||
| 1970 | 200 | 51 | 25.50% | ||
| 1971 | 193 | 43 | 22.28% | ||
| 1972 | 192 | 41 | 21.35% | ||
| 1973 | 207 | 48 | 23.19% | ||
| 1974 | 210 | 35 | 16.52% | ||
| 1975 | 230 | 38 | 16.52% | ||
| 1976 | 238 | 33 | 13.87 | ||
| 1977 | 267 | 23 | 8.61% | ||
| 1978 | 260 | 48 | 18.46% | ||
| 1979 | 291 | 39 | 13.40% | ||
| 1980 | 227 | 38 | 13.72% | ||
| 1981 | 303 | 46 | 15.18% | ||
| 1982 | 342 | 55 | 16.08% | ||
| 1983 | 353 | 72 | 20.40% | ||
| 1984 | 278 | 33 | 11.87% | ||
| 1985 | 264 | 39 | 14.77% | ||
| 1986 | 293 | 49 | 16.72% | ||
| 1987 | 333 | 31 | 9.31% | ||
| 1988 | 291 | 52 | 17.87% | ||
| 1989 | 264 | 33 | 12.50% | ||
| 1990 | 300 | 38 | 12.67% | ||
| 1991 | 300 | 40 | 13.33% | ||
| 1992 | 290 | 42 | 14.48% | ||
| 1993 | 289 | 55 | 19.03% | ||
| 1994 | 277 | 23 | 8.30% | ||
| 1995 | 233 | 24 | 10.30% | ||
| 1996 | 273 | 35 | 12.82% | ||
| 1997 | 273 | 23 | 8.42% | ||
| 1998 | 308 | 51 | 16.56% | ||
| 1999 | 255 | 28 | 10.98% | ||
| 2000 | 243 | 33 | 13.58% | ||
| 2001 | 261 | 29 | 11.11% | ||
| 2002 | 315 | 28 | 8.89% | ||
| 2003 | 298 | 26 | 8.72% | ||
| 2004 | 323 | 26 | 8.05% | ||
| 2005 | 296 | 26 | 8.78% | ||
| 2006 | 300 | 23 | 7.67% | ||
| 2007 | 335 | 22 | 6.57% | ||
| 2008 | 327 | 33 | 10.09% | ||
| 2009 | 285 | 22 | 7.72% | ||
| 2010 | 285 | 22 | 7.72% | ||
| 2011 | 325 | 23 | 7.08% | ||
| 2012 | 303 | 35 | 11.55% | ||
| 2013 | 409 | 47 | 11.49% | ||
| 2014 | 366 | 45 | 12.30% | ||
| 2015 | 433 | 41 | 9.47% | ||
| 2016 | 368 | 39 | 10.60% | ||
| 2017 | 382 | 50 | 13.09% | ||
| 2018 | 371 | 290 | 78.17% |