Year	Percent
1950	10.31489
1955	10.42093
1960	11.48878
1965	13.12702
1970	14.5833
1975	15.08735
1980	12.64319
1985	13.17992
1990	14.66049
1995	14.82067
2000	15.04061
2005	16.77953
2010	19.36029
2015	21.85352
2020	23.33889
2025	24.62621
2030	26.056
2035	28.89731
2040	32.12491
2045	33.7124
2050	34.88019
2055	35.27066
2060	34.13928
2065	33.20936
2070	33.23909
2075	33.29091
2080	33.49129
2085	33.70656
2090	33.80226
2095	33.86453
2100	34.15805