Year	Percent
1950	11.34032
1955	9.80623
1960	12.37398
1965	12.62795
1970	13.56116
1975	13.74379
1980	11.23295
1985	10.62847
1990	8.60378
1995	8.1745
2000	7.88308
2005	7.54944
2010	7.20553
2015	7.21362
2020	6.95215
2025	6.76722
2030	6.61101
2035	6.49558
2040	6.40591
2045	6.34875
2050	6.31675
2055	6.28217
2060	6.22304
2065	6.14852
2070	6.05568
2075	5.97547
2080	5.89835
2085	5.83435
2090	5.76713
2095	5.69722
2100	5.6309