Year	Percent
1950	11.41242
1955	11.66218
1960	11.88474
1965	11.50797
1970	11.85608
1975	12.16482
1980	12.38007
1985	12.57118
1990	12.97184
1995	12.84694
2000	12.86925
2005	12.66076
2010	13.55903
2015	13.76041
2020	13.41783
2025	12.09576
2030	11.46649
2035	10.71935
2040	10.08492
2045	9.48335
2050	8.8857
2055	8.28495
2060	7.71703
2065	7.23772
2070	6.84292
2075	6.50596
2080	6.22938
2085	5.98849
2090	5.78364
2095	5.6233
2100	5.5016