Year	Percent
1950	7.85223
1955	7.10248
1960	6.40466
1965	5.93791
1970	5.67931
1975	5.56655
1980	5.51933
1985	5.74428
1990	6.6842
1995	6.97472
2000	7.20414
2005	7.77184
2010	8.34763
2015	9.21523
2020	9.91926
2025	10.58282
2030	11.36845
2035	12.40161
2040	13.77534
2045	15.34868
2050	16.99586
2055	18.74131
2060	20.58503
2065	22.34686
2070	23.9445
2075	25.36625
2080	26.7881
2085	28.17779
2090	29.50307
2095	30.72768
2100	31.84898