Year	Percent
1950	8.65811
1955	12.23719
1960	13.2603
1965	11.7868
1970	9.46255
1975	9.65748
1980	9.43564
1985	9.94221
1990	9.78232
1995	7.56268
2000	5.73946
2005	4.94026
2010	5.38896
2015	5.46532
2020	4.92378
2025	4.42097
2030	4.09273
2035	3.90688
2040	3.94538
2045	4.07426
2050	4.11459
2055	4.03406
2060	3.94089
2065	3.93822
2070	4.05485
2075	4.23935
2080	4.39404
2085	4.4473
2090	4.42503
2095	4.40684
2100	4.44148