Year	Percent
1950	9.90414
1955	10.12974
1960	9.45638
1965	9.99047
1970	10.58656
1975	10.81598
1980	11.08755
1985	10.44088
1990	9.89874
1995	10.0766
2000	10.08826
2005	9.22974
2010	8.53032
2015	8.16902
2020	7.35658
2025	6.58166
2030	6.29342
2035	5.93668
2040	5.58115
2045	5.27658
2050	5.04413
2055	4.86585
2060	4.739
2065	4.66559
2070	4.60313
2075	4.55526
2080	4.52806
2085	4.51727
2090	4.52577
2095	4.54159
2100	4.5523