Year	Percent
1950	10.85648
1955	10.49942
1960	10.1224
1965	9.22457
1970	11.46281
1975	11.78564
1980	10.89114
1985	10.6942
1990	11.17608
1995	11.71501
2000	12.2201
2005	11.96142
2010	11.19616
2015	10.38296
2020	9.55428
2025	9.15157
2030	8.54403
2035	7.94685
2040	7.32081
2045	6.80215
2050	6.36711
2055	6.02857
2060	5.74361
2065	5.49589
2070	5.2913
2075	5.11624
2080	4.99547
2085	4.90852
2090	4.84544
2095	4.80758
2100	4.77417