Bestand
1981,1/4-9/10; 1982,1/4; 1983,1/4-9/12; 1984,1/4-5/8; 1985,1/4-5/8; 1986,1/4; 1987,1/4-5/8; 1988,1/4.5; 1990,6/8; 1992,6/9; 1994,6/9; 1995,1/5-10/12; 1997,1/3-10/12; 1998,1/3-7/9; 1999,1/3; 2000,7/9; 2001,1.3; 2002,1; 2004,3; 2005,1-2; 2006,2; 2007,1-2; 2008,2