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Year	Item count	Graph
1966	1
1968	1
1978	2
1986	1
1989	2
1991	1
1992	2
1993	3
1994	7
1995	6
1996	10
1997	8
1998	11
1999	25
2000	33
2001	35
2002	45
2003	54
2004	75
2005	66
2006	48
2007	85
2008	108
2009	92
2010	91
2011	58
2012	23