Year	Percent
1950	8.08481
1955	7.30981
1960	6.86459
1965	7.92307
1970	8.59725
1975	8.17416
1980	6.66978
1985	5.65189
1990	5.77697
1995	5.82408
2000	5.88428
2005	5.22929
2010	4.83952
2015	4.63239
2020	4.68283
2025	4.8623
2030	4.85794
2035	4.69209
2040	4.48066
2045	4.37708
2050	4.42865
2055	4.57407
2060	4.70902
2065	4.74115
2070	4.68894
2075	4.62553
2080	4.62388
2085	4.67566
2090	4.73642
2095	4.75269
2100	4.71179