Year	Percent
1950	13.92363
1955	13.97793
1960	13.56256
1965	13.25726
1970	13.40623
1975	13.82278
1980	14.63078
1985	15.68927
1990	17.39925
1995	19.3918
2000	22.91477
2005	26.17602
2010	29.39768
2015	30.96059
2020	31.09441
2025	29.86518
2030	27.87379
2035	26.71249
2040	26.26225
2045	26.23977
2050	26.46427
2055	25.91836
2060	24.74566
2065	23.80999
2070	23.11882
2075	22.67382
2080	22.6811
2085	22.7981
2090	22.7399
2095	22.54424
2100	22.36624