Year	Percent
1950	15.5794
1955	14.85901
1960	13.61493
1965	12.6005
1970	11.91035
1975	11.88816
1980	11.31313
1985	10.86997
1990	10.85555
1995	12.12552
2000	14.18484
2005	16.65654
2010	18.5296
2015	19.52179
2020	21.2322
2025	23.45293
2030	25.41814
2035	26.34764
2040	25.16235
2045	23.017
2050	22.39786
2055	23.60195
2060	25.36726
2065	26.78026
2070	26.32359
2075	24.50207
2080	23.34065
2085	23.08455
2090	23.49367
2095	23.91035
2100	23.85914