Year	Percent
1950	10.30938
1955	8.86578
1960	8.96877
1965	10.99368
1970	11.60298
1975	11.30552
1980	11.8531
1985	10.64401
1990	10.1726
1995	8.07332
2000	7.89003
2005	7.37153
2010	7.13769
2015	6.83983
2020	6.9027
2025	6.69191
2030	6.55594
2035	6.44094
2040	6.35448
2045	6.28341
2050	6.23719
2055	6.20787
2060	6.17334
2065	6.11002
2070	6.03632
2075	5.94746
2080	5.87491
2085	5.81078
2090	5.76002
2095	5.70517
2100	5.64692