Year	Percent
1950	9.35829
1955	9.0489
1960	8.23391
1965	12.30541
1970	12.86261
1975	13.16997
1980	12.36674
1985	11.29736
1990	11.64473
1995	10.18741
2000	9.60939
2005	8.098
2010	7.38331
2015	6.15616
2020	6.86689
2025	7.58586
2030	6.91021
2035	6.04683
2040	5.62112
2045	5.59553
2050	5.75158
2055	5.8253
2060	5.68834
2065	5.42787
2070	5.23461
2075	5.19851
2080	5.24277
2085	5.2436
2090	5.14981
2095	4.99794
2100	4.87002