Year	Percent
1950	11.42068
1955	11.18472
1960	11.4318
1965	12.49015
1970	12.38212
1975	12.2778
1980	12.20174
1985	12.28853
1990	12.40932
1995	12.17379
2000	11.45291
2005	11.23882
2010	11.49354
2015	11.25679
2020	10.87966
2025	10.33462
2030	9.96063
2035	9.66251
2040	9.37689
2045	9.08418
2050	8.77507
2055	8.47168
2060	8.17613
2065	7.9224
2070	7.68181
2075	7.44628
2080	7.21956
2085	6.98866
2090	6.77603
2095	6.57657
2100	6.38932