Year	Percent
1950	12.07408
1955	10.93784
1960	10.67658
1965	12.88968
1970	13.87283
1975	12.41702
1980	9.70854
1985	8.58408
1990	6.64981
1995	6.36193
2000	6.96013
2005	6.54947
2010	6.22552
2015	5.46856
2020	4.94854
2025	4.54286
2030	4.2757
2035	4.08089
2040	3.9923
2045	3.86357
2050	3.73174
2055	3.63752
2060	3.59585
2065	3.59128
2070	3.60399
2075	3.60594
2080	3.58729
2085	3.55637
2090	3.53815
2095	3.5259
2100	3.52051