Year	Percent
1950	8.15283
1955	8.50493
1960	7.17911
1965	6.78933
1970	7.00266
1975	7.09301
1980	6.69931
1985	5.84291
1990	5.66939
1995	6.44887
2000	6.72604
2005	5.25035
2010	5.40601
2015	5.95945
2020	5.85419
2025	5.9824
2030	5.93437
2035	5.67613
2040	5.46045
2045	5.47445
2050	5.57962
2055	5.64256
2060	5.62677
2065	5.53511
2070	5.41943
2075	5.3544
2080	5.35477
2085	5.37303
2090	5.35628
2095	5.28966
2100	5.20105