Year	Percent
1950	14.13333
1955	7.2033
1960	8.50484
1965	11.24778
1970	13.60325
1975	12.83333
1980	9.89938
1985	9.14742
1990	8.89382
1995	9.65922
2000	10.52008
2005	8.77344
2010	6.38739
2015	5.95118
2020	6.75365
2025	6.97407
2030	6.32073
2035	5.59147
2040	5.03651
2045	4.83875
2050	4.98136
2055	5.13885
2060	5.05667
2065	4.80053
2070	4.57861
2075	4.53833
2080	4.67199
2085	4.83948
2090	4.89981
2095	4.82706
2100	4.71645