Year	Percent
1950	7.77326
1955	7.90939
1960	8.54042
1965	9.50929
1970	10.82384
1975	11.63685
1980	11.71268
1985	12.20576
1990	14.66574
1995	15.46297
2000	16.69568
2005	18.50606
2010	22.09202
2015	24.55264
2020	26.40631
2025	27.98366
2030	28.84565
2035	28.82057
2040	29.09167
2045	29.52766
2050	29.86645
2055	30.57962
2060	30.8687
2065	31.13722
2070	31.71275
2075	32.21253
2080	32.77109
2085	33.33192
2090	33.84357
2095	34.32433
2100	34.83089