Year	Percent
1950	11.85387
1955	10.3868
1960	10.09532
1965	9.97952
1970	9.20194
1975	7.57695
1980	6.24883
1985	6.04013
1990	6.23841
1995	6.35621
2000	6.09853
2005	6.13238
2010	5.56859
2015	5.25837
2020	5.269
2025	5.29392
2030	5.23785
2035	5.12211
2040	4.97933
2045	4.87455
2050	4.87316
2055	4.94752
2060	4.99394
2065	4.97798
2070	4.90716
2075	4.8333
2080	4.80039
2085	4.81036
2090	4.82273
2095	4.80963
2100	4.76656