Year	Percent
1950	13.10641
1955	12.78631
1960	12.5326
1965	12.70105
1970	13.1808
1975	13.30011
1980	13.02599
1985	12.37506
1990	11.7538
1995	11.82878
2000	12.04389
2005	12.38653
2010	13.06359
2015	13.90921
2020	15.38274
2025	17.28414
2030	19.1491
2035	21.15654
2040	22.88027
2045	24.22123
2050	24.88771
2055	25.0381
2060	25.01421
2065	24.87575
2070	24.98031
2075	24.99455
2080	24.8329
2085	24.57008
2090	24.28159
2095	24.01001
2100	23.76016