Year	Percent
1950	10.5984
1955	10.38037
1960	9.46573
1965	8.86306
1970	10.94255
1975	10.91577
1980	10.48702
1985	10.3255
1990	10.71337
1995	11.50912
2000	12.05722
2005	11.26633
2010	10.48116
2015	9.56042
2020	8.78793
2025	8.66048
2030	8.92635
2035	8.4434
2040	7.87132
2045	7.34703
2050	6.9708
2055	6.72634
2060	6.53969
2065	6.3364
2070	6.10711
2075	5.89063
2080	5.71807
2085	5.6027
2090	5.52503
2095	5.45984
2100	5.38218