Year	Percent
1950	14.95556
1955	14.22667
1960	13.69235
1965	13.25777
1970	12.86084
1975	13.66333
1980	11.49393
1985	10.94213
1990	10.79519
1995	12.07205
2000	14.31749
2005	15.67933
2010	16.30979
2015	14.73521
2020	13.07147
2025	14.16629
2030	15.88751
2035	19.65709
2040	23.58685
2045	24.99838
2050	25.24269
2055	24.19645
2060	23.32501
2065	23.56628
2070	24.70277
2075	25.78448
2080	25.90016
2085	25.19836
2090	24.36382
2095	24.05163
2100	24.39725