Year	Percent
1950	14.46177
1955	17.92823
1960	16.95848
1965	17.5144
1970	17.67306
1975	14.76474
1980	13.46856
1985	12.51555
1990	13.59315
1995	11.1468
2000	9.66646
2005	8.77936
2010	7.96099
2015	7.94632
2020	7.37816
2025	6.87629
2030	6.49283
2035	6.15548
2040	5.86769
2045	5.64636
2050	5.45564
2055	5.27763
2060	5.11309
2065	4.97888
2070	4.87554
2075	4.79681
2080	4.7292
2085	4.67405
2090	4.61979
2095	4.58061
2100	4.54601