Year	Percent
1950	11.07952
1955	10.68149
1960	9.97335
1965	11.46667
1970	12.26262
1975	12.36067
1980	12.2088
1985	12.08178
1990	12.30337
1995	12.92008
2000	12.97304
2005	12.43194
2010	11.947
2015	11.64927
2020	11.5939
2025	11.54443
2030	11.09678
2035	10.60141
2040	10.16055
2045	9.81473
2050	9.52446
2055	9.23218
2060	8.91707
2065	8.57207
2070	8.25634
2075	7.96751
2080	7.72469
2085	7.46549
2090	7.20292
2095	6.95038
2100	6.71447