Year	Percent
1950	11.46662
1955	10.63681
1960	10.30728
1965	10.54826
1970	9.00889
1975	8.68301
1980	8.0858
1985	6.56137
1990	7.24365
1995	8.21279
2000	7.83717
2005	6.68383
2010	3.59043
2015	3.95992
2020	4.33673
2025	4.55202
2030	4.49452
2035	4.34416
2040	4.14283
2045	3.8777
2050	3.74676
2055	3.76141
2060	3.79652
2065	3.81744
2070	3.79317
2075	3.75613
2080	3.74997
2085	3.78554
2090	3.85709
2095	3.92234
2100	3.96198