Year	Percent
1950	9.59604
1955	13.1423
1960	15.50453
1965	15.61517
1970	13.57618
1975	13.2345
1980	12.69089
1985	13.46627
1990	13.85465
1995	12.54184
2000	10.52347
2005	9.22568
2010	10.80533
2015	12.31544
2020	10.85429
2025	9.47093
2030	8.54976
2035	8.27436
2040	8.23965
2045	8.06619
2050	7.67221
2055	7.15203
2060	6.69136
2065	6.40295
2070	6.25315
2075	6.12936
2080	5.95217
2085	5.71867
2090	5.48817
2095	5.31224
2100	5.20664