Year	Percent
1950	11.52905
1955	11.07788
1960	10.54825
1965	13.58556
1970	12.9919
1975	12.62744
1980	13.4507
1985	13.3955
1990	12.76722
1995	14.00259
2000	12.63219
2005	12.97963
2010	12.98947
2015	11.7968
2020	10.4408
2025	9.78505
2030	9.88334
2035	9.96791
2040	9.71349
2045	9.01129
2050	8.11943
2055	7.48036
2060	7.24606
2065	7.20941
2070	7.08814
2075	6.75641
2080	6.29582
2085	5.92492
2090	5.76903
2095	5.77581
2100	5.77707