Year	Percent
1950	11.55026
1955	11.61339
1960	11.34513
1965	10.90242
1970	11.80646
1975	12.69088
1980	12.97887
1985	12.37304
1990	12.64631
1995	12.52055
2000	11.96014
2005	11.23395
2010	10.81973
2015	10.20983
2020	9.19851
2025	8.46909
2030	7.92578
2035	7.36875
2040	6.83275
2045	6.33513
2050	5.92552
2055	5.62928
2060	5.39208
2065	5.19375
2070	5.03255
2075	4.9029
2080	4.81198
2085	4.74593
2090	4.70427
2095	4.6811
2100	4.66525