Year	Percent
1950	12.90463
1955	13.37656
1960	13.78794
1965	14.29019
1970	14.46237
1975	14.4444
1980	13.18532
1985	11.46465
1990	9.77804
1995	8.72201
2000	7.82657
2005	6.80893
2010	6.00954
2015	5.693
2020	5.23902
2025	4.61726
2030	4.31915
2035	4.26484
2040	4.22059
2045	4.13325
2050	4.05892
2055	4.00159
2060	3.98275
2065	4.02798
2070	4.11558
2075	4.18182
2080	4.21567
2085	4.22584
2090	4.24717
2095	4.28884
2100	4.34711