Year	Number of
1986	2.265
1994	2.306
1997	0.2405
1998	3.62
1999	4.047
2000	3.253
2001	3.531
2002	3.09
2003	2.423
2004	1.85
2005	2.171
2006	1.802
2007	1.788
2008	1.385
2009	1.013
2010	0.7989
2011	0.8796
2012	0.8666