Year	Percent
1950	9.9456
1955	8.80642
1960	7.81982
1965	8.56081
1970	10.99052
1975	11.296
1980	11.10063
1985	10.3377
1990	10.17127
1995	10.08435
2000	9.67612
2005	10.0853
2010	10.23508
2015	9.51826
2020	8.07142
2025	6.06391
2030	5.76495
2035	5.60628
2040	6.15201
2045	6.09828
2050	5.46386
2055	4.78596
2060	4.47198
2065	4.56427
2070	4.82401
2075	4.97054
2080	4.8537
2085	4.62115
2090	4.48302
2095	4.53796
2100	4.69097