Year	Percent
1950	15.78357
1955	14.26712
1960	14.2725
1965	15.08297
1970	16.86283
1975	15.77738
1980	12.73237
1985	12.81811
1990	13.72211
1995	12.51197
2000	13.36943
2005	12.60676
2010	12.53157
2015	12.50987
2020	11.41601
2025	10.416
2030	10.16893
2035	10.21991
2040	10.16633
2045	9.83158
2050	9.20201
2055	8.52881
2060	8.09741
2065	7.95169
2070	7.84901
2075	7.60356
2080	7.18977
2085	6.74536
2090	6.40247
2095	6.22519
2100	6.12722