Year	Percent
1950	12.5603
1955	13.30555
1960	13.0422
1965	13.20238
1970	13.37662
1975	13.47365
1980	13.67718
1985	14.05062
1990	14.34107
1995	13.58723
2000	13.13193
2005	12.92708
2010	11.72484
2015	11.13706
2020	11.49134
2025	11.26111
2030	10.67382
2035	10.01047
2040	9.51606
2045	9.10187
2050	8.68717
2055	8.22856
2060	7.78744
2065	7.38278
2070	7.01226
2075	6.71383
2080	6.45468
2085	6.21929
2090	6.01201
2095	5.82526
2100	5.6699