Year	Percent
1950	9.07944
1955	7.62275
1960	7.20313
1965	7.37639
1970	7.44151
1975	6.93428
1980	6.06345
1985	5.88135
1990	6.70736
1995	6.98155
2000	5.41407
2005	5.62443
2010	6.11038
2015	6.17823
2020	6.28813
2025	6.19991
2030	5.89222
2035	5.65234
2040	5.6662
2045	5.77677
2050	5.83389
2055	5.80482
2060	5.70075
2065	5.57812
2070	5.50989
2075	5.50566
2080	5.51854
2085	5.49893
2090	5.43247
2095	5.33886
2100	5.25966