21 to 41

Preserved : 1966: 11(1-4), 1967: 12(1-4), 1968: 13(1-4), 1969: 14(1-4), 1970: 15(1-4), 1971: 16(1-4), 1972: 17(1-4), 1973: 18(1-4), 1974: 19(1-4), 1975: 20(1-4), 1976: 21(1-4), 1977: 22(1-4), 1978: 23(1-4), 1979: 24(1-4), 1980: 25(1-4), 1981: 26(1-4), 1982: 27(1-4), 1983: 28(1-4), 1984: 29(1-4), 1985: 30(1-4), 1986: 31(1-4), 1987: 32(1-4), 1988: 33(1-4), 1989: 34(1-4), 1990: 35(1-4), 1991: 36(1-4), 1992: 37(1-4), 1993: 38(1-4), 1994: 39(1-4), 1995: 40(1-4), 1996: 41(1-4), 1997: 42(1-4), 1998: 43(1-4), 1999: 44(1-4), 2000: 45(1-4), 2001: 46(1-4), 2002: 47(1-4), 2003: 48(1-4), 2004: 49(1-4), 2005: 50(1-4), 2006: 51(1-4), 2007: 52(1-4), 2008: 53(1-4), 2009: 54(1-4), 2010: 55(1-4), 2011: 56(1-4), 2012: 57(1-4), 2013: 58(1-3), 2014: 59(1-3), 2015: 60(1-3), 2016: 61(1-3, ), 2017: 62(1-3), 2018: 63(1-3), 2019: 64(1-3), 2020: 65(1-3), 2021: 66(1-3), 2022: 67(1-3), 2023: 68(1)

Preserved : 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 15 (1 to 4); 16 (1-2, 3, 4); 17 (1 to 4); 18 (1-2, 3, 4); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 30 (1 to 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1, 2-3, 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1-2, 3, 4); 49 (1 to 4); 50 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 3); 59 (1 to 3); 60 (1 to 3); 61 (none, 1 to 3); 62 (1 to 3); 63 (1 to 3); 64 (1 to 3); 65 (1 to 3); 66 (1 to 3); 67 (1)