Year	per 1,000 people
1960	6.35225057601929
1970	5.58580017089844
1990	4.5942997932
1993	4.5999999046
1996	3.2899999619
2000	4.1
2005	4
2010	4.5
2011	4.39
2012	4.59
2013	4.78
2014	4.84
2015	4.96
2016	4.95
2017	4.99