Year	Percent
1950	17.73668
1955	18.51615
1960	16.15908
1965	14.66876
1970	11.87038
1975	9.98895
1980	8.75765
1985	10.22118
1990	8.68397
1995	8.39475
2000	7.68054
2005	6.29705
2010	6.55165
2015	5.39289
2020	5.40033
2025	5.60509
2030	5.81841
2035	5.73509
2040	5.43393
2045	5.14738
2050	5.06027
2055	5.1761
2060	5.3126
2065	5.30738
2070	5.16086
2075	4.98156
2080	4.88484
2085	4.89346
2090	4.95813
2095	4.97968
2100	4.9317