Year	Percent
1950	9.8367
1955	9.84018
1960	9.9152
1965	10.61633
1970	10.01634
1975	11.377
1980	11.8372
1985	10.60129
1990	9.00916
1995	9.42839
2000	9.88062
2005	9.81808
2010	9.22255
2015	8.43273
2020	7.35569
2025	7.06429
2030	6.64071
2035	6.29758
2040	5.92345
2045	5.61565
2050	5.37195
2055	5.18862
2060	5.07994
2065	4.99184
2070	4.91537
2075	4.84269
2080	4.80451
2085	4.78844
2090	4.79045
2095	4.79763
2100	4.79314