Holdings

Date                No.
1977–1996       5-42
1997                 43,44
1998                 45,46
1999                 47,48
2000                 49,50
2001                 51,52
2002                 53,54
2003                 55,56
2004                 57,58
2005                 59,60
2006                 61,62
2007                 63,64
2008                 65,66
2009                 67,68
2010                 69, 70
2011                 71, 72
2012                 73, 74
2013                 75,76
2014                 77, 78
2015                 79, 80
2016                 81, 82