Year	Percent
1950	8.12532
1955	8.67369
1960	12.90688
1965	15.1016
1970	15.46188
1975	13.48616
1980	12.63319
1985	12.17832
1990	12.86578
1995	13.52128
2000	12.25305
2005	10.26286
2010	9.41029
2015	10.50218
2020	12.2043
2025	10.94835
2030	9.68343
2035	8.81493
2040	8.58009
2045	8.59281
2050	8.46188
2055	8.09246
2060	7.57871
2065	7.11503
2070	6.82484
2075	6.67338
2080	6.53684
2085	6.33578
2090	6.07959
2095	5.83986
2100	5.66585