Year	Percent
1950	13.77933
1955	15.00549
1960	13.89898
1965	14.94438
1970	15.1673
1975	13.66678
1980	11.53174
1985	11.67252
1990	11.89033
1995	11.40847
2000	10.35613
2005	9.27848
2010	7.93757
2015	7.49788
2020	6.93937
2025	6.4888
2030	6.02212
2035	5.63904
2040	5.33145
2045	5.09275
2050	4.936
2055	4.80835
2060	4.69855
2065	4.59464
2070	4.52538
2075	4.4844
2080	4.47212
2085	4.47729
2090	4.4796
2095	4.47779
2100	4.47283