Year	Percent
1950	7.89831
1955	8.54177
1960	7.75525
1965	7.73716
1970	8.11459
1975	7.89411
1980	6.58781
1985	5.60797
1990	5.69472
1995	5.86182
2000	5.9748
2005	5.4411
2010	4.84042
2015	4.86938
2020	5.00302
2025	5.14587
2030	5.01472
2035	4.81686
2040	4.64022
2045	4.57478
2050	4.63045
2055	4.74854
2060	4.82154
2065	4.80966
2070	4.73468
2075	4.66972
2080	4.65086
2085	4.66614
2090	4.68138
2095	4.66155
2100	4.60264