Year	Percent
1950	8.54055
1955	9.99201
1960	12.08859
1965	13.41327
1970	13.39867
1975	10.90334
1980	10.79754
1985	10.45769
1990	10.44635
1995	10.78866
2000	9.43066
2005	7.40626
2010	7.27378
2015	9.14211
2020	10.57853
2025	9.22484
2030	8.08574
2035	7.36101
2040	7.21768
2045	7.40178
2050	7.53851
2055	7.3696
2060	6.91922
2065	6.44614
2070	6.18584
2075	6.12664
2080	6.12439
2085	6.04392
2090	5.85541
2095	5.62393
2100	5.44005