Year	Percent
1950	7.41932
1955	6.68119
1960	6.30443
1965	7.28621
1970	7.92795
1975	7.56306
1980	6.18692
1985	5.25614
1990	5.403
1995	5.48508
2000	5.5701
2005	4.95839
2010	4.60114
2015	4.41491
2020	4.46674
2025	4.66626
2030	4.67014
2035	4.51669
2040	4.3175
2045	4.22025
2050	4.27177
2055	4.41514
2060	4.55089
2065	4.58855
2070	4.54317
2075	4.48499
2080	4.48641
2085	4.54058
2090	4.60381
2095	4.62307
2100	4.58489