Year	Percent
1950	13.93405
1955	13.56371
1960	13.99362
1965	14.03727
1970	13.90782
1975	13.96948
1980	13.49622
1985	13.48252
1990	16.08558
1995	15.90515
2000	15.89302
2005	16.04133
2010	17.04036
2015	19.30574
2020	21.07897
2025	23.29599
2030	25.25371
2035	27.8235
2040	30.21593
2045	32.00619
2050	32.40452
2055	32.01168
2060	31.83696
2065	32.22271
2070	33.15615
2075	34.01318
2080	34.53578
2085	34.89873
2090	35.30964
2095	35.89219
2100	36.59083