Year	Percent
1950	6.65853
1955	7.14844
1960	8.50553
1965	9.90431
1970	8.87786
1975	7.13921
1980	6.93377
1985	6.84588
1990	7.32271
1995	7.20662
2000	5.47785
2005	4.33644
2010	4.22329
2015	4.89931
2020	5.5467
2025	5.39938
2030	5.06116
2035	4.64283
2040	4.49676
2045	4.75009
2050	5.1283
2055	5.30547
2060	5.20625
2065	5.00668
2070	4.91789
2075	5.01417
2080	5.2105
2085	5.32617
2090	5.28065
2095	5.13335
2100	5.00118