Year	Percent
1950	9.64871
1955	8.54718
1960	8.82391
1965	11.76708
1970	13.15682
1975	13.17095
1980	12.78875
1985	12.43266
1990	11.72857
1995	11.58724
2000	11.64792
2005	11.0781
2010	8.25841
2015	7.36931
2020	7.72817
2025	7.95207
2030	7.53191
2035	7.14351
2040	6.37656
2045	5.84789
2050	5.73042
2055	5.82631
2060	5.87622
2065	5.79126
2070	5.5963
2075	5.40602
2080	5.33921
2085	5.39373
2090	5.45815
2095	5.45135
2100	5.36555