2022: 29, 2021: 28, 2020: 27, N, 2019: 26, N, 2018: 25, N, 2015-2016: 24, N, 2014: 22, 23, N, 2012-2014: N, 2011: 21, 2010-2011: N, 2010: N, 2009: 20, N, 2008: 19, N, 2007: 18, N, 2006: 17, N, 2005: 16, N, 2004: 15, N, 2003: 14, N, 2002: 13, N, 2001: 12, N, 2000: 11, N, 1999: 10, N, 1998: 9, N, 1997: 8, N, 1996: 6, 7, N, 1995: 5, N, 1970: 1970, 1968-1999: N, 1968: 1968,