Year	per 1,000 people
1996	3.1800000668
1997	3
1998	3.0899999142
1999	3.2000000477
2000	3.2000000477
2001	2.5899999142
2003	3.2999999523
2005	2.7
2006	2.6
2007	2.6
2009	2.5