20 to 22

Preserved : 1981: 1(1-4), 1982: 2(1-6), 1983: 3(1-6), 1984: 4(1-6), 1985: 5(1-6), 1986: 6(1, S 1, 2, S 2, 3-6), 1987: 7(1, S 1, 2-6), 1988: 8(1-6), 1989: 9(1, S 1, 2-6), 1990: 10(1, S 1, 2, S 2, 3-6), 1991: 11(1-6), 1992: 12(1-6), 1993: 13(1-6), 1994: 14(1-6), 1995: 15(1-6), 1996: 16(1-6), 1997: 17(1-6), 1998: 18(1-6), 1999: 19(1-6), 2000: 20(1-6), 2001: 21(1-6), 2002: 22(1-6), 2003: 23(1-6), 2004: 24(1-6), 2005: 25(1, S 1, 2-6), 2006: 26(1, S 1, 2-6), 2007: 27(1-6), 2008: 28(1-6), 2009: 29(1-6), 2009: 30(1-6), 2010: 31(1-6), 2010: 32(1-6), 2011: 33(1, S 1, 2-6), 2011: 34(1-6), 2012: 35(1-6), 2012: 36(1-6), 2013: 37(1-6), 2013: 38(1-6), 2014: 39(1-6), 2014: 40(1-6), 2015: 41(1-5, 4-6), 2015: 42(1-6), 2016: 43(1-6), 2016: 44(1-6), 2017: 45(1-6), 2017: 46(1-6), 2018: 47(1, S 1, 2-6), 2018: 48(1-6), 2019: 49(1-6), 2019: 50(1-6), 2020: 51(1-12), 2021: 52(1-12), 2022/2023: 53(1-12), 2023: 54(1-4, 7-12), 2024: 55(1-5)

Preserved : 1 (2, 3-4); 2 (1 to 6); 3 (1, 2-3, 4 to 6); 4 (1 to 6); 5 (1 to 6); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 6); 12 (1-2, 3 to 6); 13 (1 to 6); 14 (1 to 3, 4-6); 15 (1 to 6); 16 (1 to 6); 17 (1, 2, 3-4, 5, 6); 18 (1 to 6); 19 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (1, 2-3, 4, 5-6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 40 (1 to 6); 41 (1 to 3, 4-5, 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (Suppl, 1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 4, 7 to 12); 52 (1 to 3, 5 to 9, 10-11, 12); 53 (1, 2-3, 4 to 7, 8-9, 10, 11-12); 54 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 55 (1)

26 (S1, 1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (S1, 1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 40 (1 to 6); 41 (1 to 4-5, 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (S1, 1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6)