Year	Percent
1950	14.03706
1955	13.37388
1960	12.68986
1965	13.78101
1970	14.42773
1975	14.55152
1980	14.21478
1985	14.06756
1990	14.19119
1995	14.6422
2000	13.79814
2005	12.74164
2010	11.39181
2015	11.54173
2020	11.54554
2025	10.88214
2030	10.05474
2035	9.32251
2040	8.83688
2045	8.54328
2050	8.23901
2055	7.81008
2060	7.33821
2065	6.94414
2070	6.65893
2075	6.43588
2080	6.23137
2085	6.00675
2090	5.7849
2095	5.59265
2100	5.45816