Year	Percent
1950	10.05243
1955	9.62198
1960	9.29484
1965	9.71375
1970	10.71515
1975	10.80858
1980	10.75343
1985	10.94713
1990	10.90983
1995	11.126
2000	11.12629
2005	10.9489
2010	10.98076
2015	10.69574
2020	10.15634
2025	9.1889
2030	8.24697
2035	7.92431
2040	7.58379
2045	7.17775
2050	6.72479
2055	6.30858
2060	5.97301
2065	5.70713
2070	5.51201
2075	5.35058
2080	5.2228
2085	5.09348
2090	4.99946
2095	4.93157
2100	4.89058