Year	Percent
1950	13.74457
1955	14.20179
1960	14.89035
1965	15.32372
1970	16.20146
1975	16.97389
1980	17.2279
1985	17.51041
1990	22.22572
1995	22.22508
2000	22.70886
2005	23.55684
2010	24.92355
2015	25.37459
2020	26.86336
2025	29.36966
2030	31.87492
2035	33.28383
2040	34.2136
2045	35.49752
2050	36.37933
2055	36.83218
2060	36.79182
2065	36.60097
2070	36.59887
2075	36.89935
2080	37.4226
2085	37.92279
2090	38.39543
2095	38.85153
2100	39.35655