Year	Percent
1950	7.93498
1955	7.82583
1960	7.9055
1965	7.95495
1970	8.30252
1975	9.11406
1980	9.62266
1985	8.08404
1990	12.8898
1995	12.09268
2000	12.12994
2005	11.69892
2010	11.20466
2015	11.48883
2020	12.71325
2025	14.93841
2030	15.74962
2035	16.79078
2040	18.80067
2045	22.13275
2050	26.71691
2055	29.87254
2060	32.00393
2065	33.20762
2070	34.79619
2075	36.68554
2080	38.45551
2085	39.64777
2090	40.26541
2095	40.67532
2100	41.24363