Year	Percent
1950	12.07799
1955	11.75863
1960	10.83085
1965	11.86184
1970	12.22264
1975	12.6222
1980	12.28687
1985	11.48915
1990	12.13832
1995	13.53028
2000	13.03758
2005	12.37027
2010	11.83542
2015	11.14728
2020	10.71653
2025	10.12841
2030	9.68051
2035	9.18698
2040	8.71863
2045	8.30228
2050	7.93328
2055	7.62372
2060	7.32647
2065	7.07914
2070	6.85553
2075	6.68009
2080	6.53324
2085	6.40547
2090	6.28568
2095	6.18027
2100	6.09076