Year	Percent
1950	12.12486
1955	12.4102
1960	12.74386
1965	11.55116
1970	11.99466
1975	12.51045
1980	12.80909
1985	12.75089
1990	12.57042
1995	12.46679
2000	12.33783
2005	12.06305
2010	11.88125
2015	11.34819
2020	11.42578
2025	11.52519
2030	10.96514
2035	10.3994
2040	9.97025
2045	9.68226
2050	9.44491
2055	9.22393
2060	8.93924
2065	8.59863
2070	8.28422
2075	8.02841
2080	7.8001
2085	7.57245
2090	7.33617
2095	7.0999
2100	6.86329