Year	Percent
1950	10.4224
1955	10.18733
1960	10.00132
1965	9.60299
1970	9.08818
1975	8.76983
1980	8.54656
1985	8.28072
1990	8.98266
1995	8.75157
2000	8.33516
2005	7.72233
2010	6.99008
2015	6.40833
2020	6.37041
2025	6.77384
2030	7.65255
2035	8.84215
2040	10.24628
2045	11.77757
2050	13.18918
2055	14.29207
2060	15.15495
2065	15.9878
2070	17.18017
2075	18.83176
2080	20.45753
2085	21.86228
2090	23.12478
2095	24.31895
2100	25.49901