Year	Percent
1950	10.12237
1955	10.29908
1960	10.3527
1965	9.97748
1970	9.56986
1975	9.27064
1980	9.60707
1985	10.5939
1990	9.6713
1995	9.38767
2000	9.10866
2005	8.50401
2010	8.35599
2015	8.06587
2020	7.85376
2025	7.49901
2030	7.15015
2035	6.84603
2040	6.57608
2045	6.33659
2050	6.11842
2055	5.91763
2060	5.72243
2065	5.54867
2070	5.41028
2075	5.29119
2080	5.19465
2085	5.10241
2090	5.01306
2095	4.93706
2100	4.86894