Year	Percent
1950	6.13213
1955	4.89126
1960	5.05839
1965	5.32289
1970	6.38608
1975	7.54317
1980	8.98207
1985	9.77347
1990	12.01685
1995	13.50142
2000	14.91589
2005	16.61164
2010	19.59081
2015	23.67556
2020	27.2719
2025	30.93216
2030	33.40477
2035	34.14224
2040	32.93132
2045	31.57543
2050	30.24552
2055	28.61924
2060	29.26998
2065	30.75576
2070	32.88057
2075	33.68942
2080	34.86307
2085	35.66113
2090	36.32986
2095	37.00874
2100	37.59869