Year	Percent
1950	5.58543
1955	5.22393
1960	4.91997
1965	4.85471
1970	4.87484
1975	5.45509
1980	5.97096
1985	6.81709
1990	8.19972
1995	8.89627
2000	9.45528
2005	10.26329
2010	12.19515
2015	15.32009
2020	18.34427
2025	21.68774
2030	24.91342
2035	27.02802
2040	28.50727
2045	29.08079
2050	29.35847
2055	29.86261
2060	30.92623
2065	32.50021
2070	33.877
2075	35.30448
2080	36.47511
2085	37.53484
2090	38.53134
2095	39.41118
2100	40.103