17, 21 to 37, 51

20

Preserved : 1 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 2 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 3 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 11 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 12 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 13 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 14 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 15 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 16 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 17 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 18 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 19 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 21 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 22 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 23 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 24 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 25 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 26 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 27 (1 to 7, 9, 11 to 17, 19, 21 to 29, 31 to 38, 41 to 49); 28 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 29 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 31 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 32 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 33 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 34 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 35 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 36 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 47); 51 (1 to 3)

Preserved : 1 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 2 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 3 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 11 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 12 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 13 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 14 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 15 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 16 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 17 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 18 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 19 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 21 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 22 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 23 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 24 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 25 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 26 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 27 (1 to 7, 9, 11 to 17, 19, 21 to 29, 31 to 38, 41 to 49); 28 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 29 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 31 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 32 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 33 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 34 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 35 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 36 (1 to 9, 11 to 19, 21); 51 (1 to 3)

Preserved : 1 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 2 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 3 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 11 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 12 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 13 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 14 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 15 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 16 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 17 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 18 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 19 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 21 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 22 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 23 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 24 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 25 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 26 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 27 (1 to 7, 9, 11 to 17, 19, 21 to 29, 31 to 38, 41 to 49); 28 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 29 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 31 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 32 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 33 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 34 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 35 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49); 36 (1 to 9, 11 to 19, 21 to 29, 31 to 35); 51 (1 to 3)

Preserved : 1989: 1(1-51, S A, S B), 1990: 2(1-51, S), 1991: 3(1-51, S), 1992: 4(1-50), 1993: 5(1-50), 1994: 6(1-50), 1995: 7(1-50), 1996: 8(1-50), 1997: 9(1-50), 1998: 10(1-50), 1999: 11(1-50), 2000: 12(1-8, 8, A, 9-50), 2001: 13(1-50), 2002: 14(1-50), 2003: 15(19, 34-50), 2004: 16(1-50), 2005: 17(1-50), 2006: 18(1-50), 2007: 19(1-50), 2008: 20(1-50), 2009: 21(1-50), 2010: 22(1-50), 2011: 23(1-50), 2011/2012: 24(1-16, 21-50), 2012/2013: 25(1-50), 2013/2014: 26(1-50), 2015: 27(1-50), 2015/2016: 28(1-50), 2016/2017: 29(1-50), 2017/2018: 30(1-50), 2018/2019: 31(1-50), 2019/2020: 32(1-50), 2020/2021: 33(1-50), 2022: 34(1-50), 2023: 35(1-50), 2024: 36(1-50), 2025: 37(1-4)

Preserved : 1 (SB, 1 to 51); 2 (S, 1 to 51); 3 (S, 1 to 51); 4 (1 to 50); 5 (1 to 50); 6 (1 to 50); 7 (1 to 50); 8 (1 to 50); 9 (1 to 50); 10 (1 to 50); 11 (1 to 50); 12 (1 to 7 to 9 to 50); 13 (1 to 50); 14 (1 to 50); 15 (1 to 50); 16 (1 to 50); 17 (1 to 50); 18 (1 to 50); 19 (1 to 50); 20 (1 to 50); 21 (1 to 50); 22 (1 to 12, 15 to 50); 23 (1 to 50); 24 (1 to 50); 25 (1 to 50); 26 (1 to 5, 7 to 50); 27 (1 to 50); 28 (1 to 50); 29 (1 to 50); 30 (1 to 50); 31 (1 to 50); 32 (1 to 50); 33 (1 to 50); 34 (1 to 50); 35 (1 to 10); 51 (1 to 3)