Year	Percent
1950	7.87162
1955	7.42448
1960	7.0228
1965	6.8948
1970	6.82622
1975	5.45166
1980	5.08334
1985	5.07038
1990	5.46509
1995	5.41606
2000	5.25403
2005	5.13252
2010	4.81415
2015	4.64621
2020	4.51492
2025	4.44832
2030	4.40513
2035	4.37194
2040	4.34136
2045	4.32878
2050	4.3389
2055	4.36877
2060	4.40488
2065	4.43601
2070	4.44516
2075	4.4408
2080	4.42769
2085	4.41395
2090	4.40079
2095	4.38477
2100	4.35545