Year	Percent
1950	10.72758
1955	10.03026
1960	9.37383
1965	10.24617
1970	11.60722
1975	10.11161
1980	9.47887
1985	9.62397
1990	8.54942
1995	8.44947
2000	8.64607
2005	8.23575
2010	7.74198
2015	6.49959
2020	5.97765
2025	5.49772
2030	5.69577
2035	5.74827
2040	5.64257
2045	5.39034
2050	5.12601
2055	5.00624
2060	5.0569
2065	5.17925
2070	5.24384
2075	5.19075
2080	5.08314
2085	5.01013
2090	5.0155
2095	5.07231
2100	5.10355