Year	Percent
1950	10.39427
1955	9.24345
1960	9.72253
1965	12.56443
1970	12.64761
1975	12.41869
1980	11.74011
1985	11.03086
1990	10.64969
1995	9.88271
2000	9.27745
2005	10.79268
2010	9.87705
2015	8.80386
2020	7.01515
2025	6.25306
2030	5.70667
2035	6.16807
2040	6.04037
2045	5.37221
2050	4.67946
2055	4.34254
2060	4.39046
2065	4.59474
2070	4.69754
2075	4.57152
2080	4.35706
2085	4.24701
2090	4.32605
2095	4.50002
2100	4.61791