Year	Percent
1950	14.38503
1955	14.6395
1960	14.24421
1965	13.37133
1970	12.35971
1975	11.6518
1980	11.55556
1985	12.49819
1990	13.49368
1995	14.33509
2000	13.15817
2005	15.26216
2010	15.75217
2015	17.79738
2020	19.18619
2025	22.99248
2030	28.22706
2035	31.88621
2040	31.97163
2045	30.43789
2050	29.50903
2055	29.06131
2060	29.07348
2065	28.74306
2070	27.2693
2075	25.09332
2080	23.25004
2085	22.54015
2090	22.74587
2095	23.16799
2100	23.34245