Year	Percent
1950	16.61335
1955	16.63282
1960	16.14779
1965	15.79555
1970	12.54731
1975	11.74287
1980	11.92803
1985	12.84569
1990	10.68588
1995	8.27234
2000	6.92565
2005	6.8879
2010	7.12894
2015	6.86352
2020	6.09123
2025	5.44135
2030	5.08418
2035	5.02775
2040	5.09404
2045	5.07438
2050	4.91185
2055	4.71288
2060	4.60743
2065	4.62935
2070	4.72711
2075	4.80134
2080	4.7961
2085	4.73405
2090	4.6844
2095	4.69445
2100	4.74295