Year	Percent
1950	8.99078
1955	9.70403
1960	8.69522
1965	12.8703
1970	13.44387
1975	13.54971
1980	12.73162
1985	11.67825
1990	12.21825
1995	10.59418
2000	10.22241
2005	8.46846
2010	7.32302
2015	6.25579
2020	7.17857
2025	8.24071
2030	7.67476
2035	6.79247
2040	6.36239
2045	6.36699
2050	6.54025
2055	6.59367
2060	6.39612
2065	6.04812
2070	5.77912
2075	5.67874
2080	5.69321
2085	5.6651
2090	5.54495
2095	5.37119
2100	5.22822