Year	Percent
1950	14.656
1955	14.65045
1960	14.86278
1965	15.01149
1970	16.58821
1975	16.71289
1980	16.17663
1985	16.12915
1990	15.5756
1995	15.76743
2000	16.39306
2005	15.29136
2010	13.66266
2015	13.19045
2020	12.90571
2025	12.46217
2030	11.77998
2035	11.03123
2040	10.3664
2045	9.8363
2050	9.39866
2055	8.9737
2060	8.5312
2065	8.07736
2070	7.67136
2075	7.30781
2080	6.99654
2085	6.70862
2090	6.43633
2095	6.18447
2100	5.94595