Year	Percent
1950	10.67005
1955	9.72893
1960	11.27454
1965	12.57018
1970	12.85857
1975	12.97104
1980	13.06565
1985	13.4016
1990	13.70263
1995	14.0032
2000	13.68421
2005	12.5031
2010	12.73637
2015	12.64649
2020	12.49901
2025	11.62303
2030	11.09583
2035	10.65077
2040	10.28092
2045	9.8926
2050	9.45308
2055	9.01223
2060	8.62632
2065	8.26712
2070	7.93304
2075	7.61643
2080	7.3073
2085	6.99612
2090	6.71906
2095	6.48672
2100	6.27623