Holdings
1992: 1, 2, 3, 5; 1993: 2, 3, 4, 5, 6; 1994: 1, 3, 5; 1995: 2; 1996: 2, 3, 6; 1998: 1, 2, 4, 6; 1999: 2, 3, 4, 6; 2000: 1, 2, 3, 4, 5, 6; 2001: 1, 2, 3, 4, 5, 6; 2002: 1, 2, 3, 4, 5, 6; 2003: 1, 2, 3, 4, 5, 6; 2004: 1, 2, 3, 4, 5, 6; 2005: 1, 2, 3, 4, 5, 6; 2006: 1, 2, 3, 4, 5, 6; 2007: 1, 2, 3, 4, 5, 6; 2008: 1, 2, 3, 4, 5, 6; 2009: 1, 2, 3, 4, 5, 6; 2010: 1, 2, 3, 4, 5, 6; 2011: 1, 2, 3, 4, 5, 6; 2012: 1, 2, 3, 4, 5, 6; 2013: 1, 2, 3, 4, 5, 6; 2014: 1, 2, 3, 4, 5, 6; 2015: 1/2, 3, 4, 5, 6; 2016: 1, 2, 3, 4/5, 6; 2017: 1, 2, 3, 4/5, 6; 2018: 1, 2, 3, 4, 5, 6; 2019: 1/2, 3/4, 5, 6/1-2020; 2020: 2, 3; 2022: 2