Year	Percent
1950	10.53228
1955	9.68434
1960	7.98854
1965	7.40114
1970	7.38179
1975	8.89923
1980	9.14999
1985	7.08592
1990	6.61989
1995	6.05547
2000	4.59247
2005	4.81364
2010	5.64678
2015	5.44751
2020	5.27498
2025	4.98013
2030	4.6488
2035	4.53795
2040	4.79151
2045	5.06954
2050	5.12203
2055	5.02273
2060	4.8902
2065	4.83327
2070	4.92351
2075	5.10509
2080	5.2235
2085	5.20398
2090	5.08876
2095	4.97081
2100	4.9259