Year	Percent
1950	10.1481
1955	8.90866
1960	8.02974
1965	10.16238
1970	9.9823
1975	10.50655
1980	10.46893
1985	10.29786
1990	9.71923
1995	10.30663
2000	11.13087
2005	11.49117
2010	9.93652
2015	8.67708
2020	8.60859
2025	8.71983
2030	10.20777
2035	9.3044
2040	8.43109
2045	7.94779
2050	7.9462
2055	8.03449
2060	7.82159
2065	7.45701
2070	7.09481
2075	6.83593
2080	6.68029
2085	6.51535
2090	6.30993
2095	6.08363
2100	5.88568