Year	Percent
1950	10.25397
1955	9.65589
1960	9.05682
1965	8.74067
1970	10.92898
1975	10.4849
1980	10.29671
1985	10.15105
1990	10.43858
1995	10.81027
2000	10.72715
2005	10.73879
2010	10.50517
2015	10.42728
2020	10.79683
2025	11.15763
2030	11.00086
2035	10.75752
2040	10.60773
2045	10.50266
2050	10.36762
2055	10.18571
2060	9.95358
2065	9.69307
2070	9.43451
2075	9.18899
2080	8.95843
2085	8.73007
2090	8.49448
2095	8.26392
2100	8.04696