Year	Percent
1950	7.3572
1955	6.62998
1960	6.18143
1965	7.7349
1970	7.75886
1975	8.25787
1980	8.53638
1985	7.68968
1990	6.94608
1995	6.27413
2000	6.20243
2005	6.19249
2010	6.22242
2015	5.80494
2020	5.71609
2025	5.95699
2030	5.93349
2035	5.88708
2040	5.69278
2045	5.53703
2050	5.45263
2055	5.49755
2060	5.58084
2065	5.61524
2070	5.58658
2075	5.50782
2080	5.43532
2085	5.40025
2090	5.39899
2095	5.39138
2100	5.36296