Year	Percent
1950	11.8027
1955	10.85637
1960	9.39708
1965	8.47108
1970	10.07881
1975	12.28663
1980	9.91659
1985	9.04101
1990	10.42596
1995	11.28052
2000	10.67845
2005	9.92231
2010	9.06995
2015	8.48277
2020	8.05002
2025	8.27944
2030	7.79532
2035	7.41531
2040	7.02375
2045	6.68847
2050	6.44764
2055	6.30384
2060	6.18238
2065	6.05174
2070	5.89758
2075	5.75994
2080	5.65004
2085	5.56539
2090	5.49998
2095	5.43362
2100	5.36634