Year	Percent
1950	16.67272
1955	17.78883
1960	18.64769
1965	18.08925
1970	15.68447
1975	13.6109
1980	14.96992
1985	15.63833
1990	16.01392
1995	15.18461
2000	14.18264
2005	11.71189
2010	13.59058
2015	13.12285
2020	12.52624
2025	11.73962
2030	10.8833
2035	10.26274
2040	10.12084
2045	10.14422
2050	9.88573
2055	9.38733
2060	8.82641
2065	8.38485
2070	8.1498
2075	8.02924
2080	7.86108
2085	7.54834
2090	7.16045
2095	6.82773
2100	6.61183