Year	Percent
1950	7.54288
1955	6.96753
1960	6.44826
1965	6.0776
1970	5.73269
1975	5.56684
1980	5.42183
1985	5.40367
1990	6.2621
1995	6.64932
2000	7.2272
2005	8.00453
2010	8.68822
2015	9.9255
2020	11.32267
2025	12.8321
2030	14.49676
2035	16.23255
2040	17.96856
2045	19.78874
2050	21.75678
2055	23.70487
2060	25.56504
2065	27.20141
2070	28.85458
2075	30.46001
2080	31.94467
2085	33.27113
2090	34.45034
2095	35.50567
2100	36.43434