Year	Percent
1950	10.12377
1955	10.30955
1960	9.59324
1965	10.13075
1970	10.74664
1975	10.97628
1980	11.22369
1985	10.5806
1990	10.14817
1995	10.48667
2000	10.59385
2005	9.76877
2010	9.09107
2015	8.74145
2020	7.90624
2025	7.11161
2030	6.84571
2035	6.47882
2040	6.10353
2045	5.77649
2050	5.52027
2055	5.31737
2060	5.16828
2065	5.07751
2070	5.00052
2075	4.94009
2080	4.90107
2085	4.87891
2090	4.87782
2095	4.88523
2100	4.88645