Year	Percent
1950	8.1735
1955	7.53608
1960	6.93187
1965	6.48557
1970	6.08158
1975	5.8767
1980	5.706
1985	5.668
1990	6.62438
1995	7.03603
2000	7.66181
2005	8.49554
2010	9.23275
2015	10.54063
2020	12.00392
2025	13.60356
2030	15.377
2035	17.22974
2040	19.07827
2045	20.99154
2050	23.02211
2055	25.00013
2060	26.8691
2065	28.49545
2070	30.13275
2075	31.71975
2080	33.19443
2085	34.51078
2090	35.67748
2095	36.72265
2100	37.65935