Year	Percent
1950	6.36937
1955	6.69696
1960	6.87361
1965	6.9717
1970	7.05811
1975	7.11764
1980	7.30923
1985	7.56869
1990	9.12941
1995	9.76186
2000	10.54899
2005	11.79093
2010	13.15495
2015	15.15489
2020	17.41625
2025	19.88951
2030	22.4208
2035	24.56021
2040	26.38457
2045	28.33951
2050	30.5893
2055	32.53159
2060	33.9913
2065	35.07537
2070	36.04943
2075	36.76611
2080	37.35514
2085	37.82159
2090	38.19172
2095	38.50194
2100	38.78415