Year	Percent
1950	8.51183
1955	9.18596
1960	9.55172
1965	9.95823
1970	10.16303
1975	10.16118
1980	10.5464
1985	10.89829
1990	13.39872
1995	13.8303
2000	13.82509
2005	14.64308
2010	15.85989
2015	18.30522
2020	20.77337
2025	22.89616
2030	24.48671
2035	25.93455
2040	27.12794
2045	28.53659
2050	29.64576
2055	31.33193
2060	32.15869
2065	32.81985
2070	33.9934
2075	34.86273
2080	35.60827
2085	36.24702
2090	36.78107
2095	37.26538
2100	37.76507