Year	Percent
1950	7.14474
1955	7.62753
1960	7.90266
1965	8.30884
1970	8.29746
1975	7.89563
1980	7.92728
1985	7.97132
1990	9.50136
1995	9.90222
2000	10.14813
2005	10.29812
2010	10.71804
2015	12.20734
2020	14.55731
2025	17.11569
2030	19.71113
2035	22.50078
2040	25.27211
2045	28.12373
2050	30.99699
2055	33.48904
2060	34.22174
2065	34.50314
2070	35.02122
2075	35.73575
2080	36.34717
2085	36.92349
2090	37.20263
2095	37.29259
2100	37.55097