Year	Percent
1950	8.86096
1955	10.65501
1960	12.95965
1965	14.18933
1970	14.11981
1975	11.41034
1980	11.43387
1985	11.04335
1990	10.98032
1995	11.30192
2000	10.02774
2005	7.85735
2010	7.72182
2015	9.71269
2020	11.22735
2025	9.79184
2030	8.59678
2035	7.83703
2040	7.68807
2045	7.87996
2050	8.01379
2055	7.82081
2060	7.33042
2065	6.81588
2070	6.52412
2075	6.44227
2080	6.41955
2085	6.31889
2090	6.11159
2095	5.8647
2100	5.66779