Year	Percent
1950	8.11007
1955	9.87594
1960	10.75344
1965	11.49652
1970	11.34138
1975	11.94308
1980	12.93765
1985	12.60387
1990	12.91767
1995	13.29635
2000	13.34736
2005	12.03404
2010	12.39305
2015	12.75504
2020	13.18114
2025	11.84283
2030	10.78716
2035	10.1772
2040	9.82033
2045	9.50857
2050	9.10251
2055	8.60742
2060	8.07153
2065	7.59308
2070	7.20276
2075	6.86165
2080	6.55072
2085	6.24176
2090	5.95612
2095	5.71157
2100	5.5135