to 50

Preserved : 1967: 16(1), 1968: 17(1), 1969: 18(1-3), 1970: 19(1-4), 1971: 20(1-4), 1972: 21(1-4), 1973: 22(1-4), 1974: 23(1-4), 1975: 24(1-4), 1976: 25(1-4), 1977: 26(1-4), 1978: 27(1-4), 1979: 28(1-4), 1980: 29(1-4), 1981: 30(1-4), 1982: 31(1-4), 1983: 32(1-4), 1984: 33(1-4), 1985: 34(1-4), 1986: 35(1-4), 1987: 36(1-4), 1988: 37(1-4), 1989: 38(1-4), 1990: 39(1-4), 1991: 40(1, Part 2, 2-4), 1992: 41(1-4), 1993: 42(1-4), 1994: 43(1-2, 3p1-2, 4), 1995: 44(1-4), 1996: 45(1-4), 1997: 46(1-4), 1998: 47(1-4), 1999: 48(1-6), 2000: 49(1-6), 2001: 50(1-6), 2002: 51(1-6), 2003: 52(1-6), 2004: 53(1-6), 2005: 54(1-6), 2006: 55(1-6), 2007: 56(1-3, 4, Part 1, 4, Part 2, 5, Part 1, 5, Part 2, 6, Part 1, 6, Part 2), 2008: 57(1-6), 2009: 58(1-9), 2010: 59(1-9), 2011: 60(1-9), 2012: 61(1-3, 5-7, 9), 2013: 62(1-2, 7-9), 2014: 63(1-9), 2015: 64(1-12, ), 2016: 65(1-12), 2017: 66(1-12), 2018: 67(1-12), 2019: 68(1-12), 2020: 69(1-12), 2021: 70(1-12), 2022: 71(1-12), 2023: 72(1-12), 2024: 73(3-7, 9), 2024: PP(99)

Preserved : PP (99); 16 (1); 17; 18 (2, 3); 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 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1_Part_2, 2 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 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1, 3 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 3, 4_Part_1, 5_Part_1, 6_Part_2); 57 (1 to 6); 58 (1 to 9); 59 (1 to 9); 60 (1 to 9); 61 (1 to 9); 62 (1 to 9); 63 (1 to 9); 64 (none, 1 to 12); 65 (1 to 12); 66 (1 to 12); 67 (1 to 12); 68 (1 to 12); 69 (1 to 12); 70 (1 to 12); 71 (1 to 12); 72 (1 to 12); 73 (1 to 3)