Year	Percent
1950	9.78829
1955	9.70059
1960	9.60551
1965	9.67495
1970	11.47236
1975	11.33525
1980	11.15555
1985	10.86129
1990	10.55005
1995	10.50356
2000	10.41912
2005	10.41795
2010	10.36011
2015	9.81989
2020	9.16886
2025	8.97456
2030	8.75691
2035	8.51948
2040	8.2386
2045	7.95265
2050	7.6781
2055	7.4042
2060	7.15345
2065	6.92421
2070	6.69793
2075	6.46578
2080	6.26124
2085	6.07805
2090	5.91839
2095	5.77346
2100	5.64225