Holdings
21.1998/99,2-4; 22.2000,2-4; 23.2001,1-2u.4; 24.2002,2; 25.2003,4 ; 26.2004; 27.2005,1-2u.4; 28.2006,3; 31.2009,3u.6; 32.2010,1u.3u.5-6; 33.2011; 34.2012,1-4u.6-7; 35.2013,1-2u.4-7; 36.2014; 37.2015,1-6; 38.2016; 39.2017,1-5u.7; 40.2018,1-3u.5-7; 41.2019,1u.3-4u.6-8; 42.2020,1-3u.6-8; 43.2021,1