Year	Percent
1950	9.16926
1955	8.25826
1960	8.8834
1965	10.29913
1970	11.85982
1975	12.51003
1980	11.26529
1985	10.96438
1990	13.91352
1995	16.53601
2000	18.25049
2005	18.33584
2010	20.18504
2015	22.35972
2020	24.60607
2025	26.54021
2030	27.74324
2035	29.31549
2040	30.98787
2045	32.68707
2050	34.14199
2055	34.86881
2060	35.79273
2065	35.88661
2070	36.56775
2075	37.02942
2080	37.15648
2085	37.12013
2090	37.08133
2095	37.07574
2100	37.17268