Year	Percent
1950	13.82643
1955	13.30176
1960	13.63388
1965	14.22989
1970	13.74524
1975	13.51187
1980	13.03577
1985	11.71132
1990	11.85187
1995	12.32682
2000	12.18636
2005	11.70678
2010	11.21169
2015	9.943
2020	9.45781
2025	8.94672
2030	8.70957
2035	8.33698
2040	7.87328
2045	7.42379
2050	7.0685
2055	6.78118
2060	6.55014
2065	6.33576
2070	6.12624
2075	5.93693
2080	5.785
2085	5.64912
2090	5.5144
2095	5.39706
2100	5.30313