Year	Percent
1950	11.94555
1955	11.79634
1960	12.48318
1965	13.15237
1970	13.77688
1975	14.44215
1980	14.72959
1985	13.50915
1990	11.39632
1995	11.13476
2000	11.12463
2005	10.4988
2010	9.16213
2015	7.48846
2020	6.1329
2025	5.87725
2030	5.65276
2035	5.37395
2040	5.09227
2045	4.7807
2050	4.4986
2055	4.34479
2060	4.31097
2065	4.31963
2070	4.309
2075	4.2738
2080	4.24531
2085	4.25768
2090	4.31789
2095	4.39408
2100	4.45505