Year	Percent
1950	13.31738
1955	17.01264
1960	16.8248
1965	16.18799
1970	14.80189
1975	13.98494
1980	13.66053
1985	12.65137
1990	11.06363
1995	10.49296
2000	9.10054
2005	8.22532
2010	6.31339
2015	7.81485
2020	7.20362
2025	6.93336
2030	6.38621
2035	5.50785
2040	4.75296
2045	4.38858
2050	4.40875
2055	4.55976
2060	4.58346
2065	4.38004
2070	4.11332
2075	3.97561
2080	4.04338
2085	4.22303
2090	4.36547
2095	4.37487
2100	4.27803