Year	Percent
1950	12.12996
1955	12.20055
1960	12.19806
1965	12.15374
1970	12.0826
1975	11.98395
1980	11.86014
1985	11.76727
1990	11.70375
1995	11.46085
2000	11.19733
2005	11.07621
2010	11.16502
2015	11.59016
2020	12.22892
2025	12.83866
2030	13.30816
2035	13.74826
2040	14.3003
2045	15.06979
2050	16.11441
2055	17.22489
2060	18.16269
2065	18.96497
2070	19.63473
2075	20.24758
2080	20.88367
2085	21.47114
2090	21.95486
2095	22.35098
2100	22.69955