Year	Percent
1950	12.79638
1955	13.34771
1960	13.63722
1965	13.89486
1970	14.12516
1975	14.39811
1980	15.97691
1985	16.38598
1990	14.58235
1995	14.277
2000	14.07812
2005	13.69098
2010	13.00827
2015	12.36411
2020	12.72705
2025	12.11547
2030	11.39581
2035	10.66508
2040	10.04377
2045	9.54574
2050	9.12668
2055	8.69512
2060	8.23053
2065	7.78165
2070	7.39491
2075	7.0728
2080	6.80571
2085	6.57221
2090	6.33953
2095	6.12955
2100	5.95546