Year	Percent
1950	12.43622
1955	14.14399
1960	14.85596
1965	15.76539
1970	15.76325
1975	14.0629
1980	12.28796
1985	13.27484
1990	13.5686
1995	14.6406
2000	14.10987
2005	13.91515
2010	11.21534
2015	12.56767
2020	12.24365
2025	11.75758
2030	11.10409
2035	10.39637
2040	9.84895
2045	9.74134
2050	9.8164
2055	9.63598
2060	9.22664
2065	8.7456
2070	8.35762
2075	8.16084
2080	8.07692
2085	7.95611
2090	7.69083
2095	7.33636
2100	7.0255