Year	Percent
1950	9.69026
1955	9.75667
1960	9.90376
1965	10.72283
1970	10.66814
1975	11.38364
1980	10.82024
1985	10.50055
1990	9.77551
1995	9.94901
2000	9.73106
2005	8.44855
2010	7.8616
2015	7.35286
2020	7.591
2025	7.57474
2030	6.8472
2035	6.30892
2040	5.87416
2045	5.66775
2050	5.65793
2055	5.62991
2060	5.42786
2065	5.14322
2070	4.91388
2075	4.81698
2080	4.82382
2085	4.85742
2090	4.8075
2095	4.68764
2100	4.56928