Year	Percent
1950	8.01093
1955	10.37047
1960	9.39649
1965	8.53818
1970	7.30828
1975	7.63507
1980	7.43942
1985	7.42013
1990	6.71928
1995	5.49042
2000	4.42373
2005	4.22784
2010	5.20053
2015	5.39754
2020	5.24305
2025	4.92579
2030	4.59398
2035	4.48701
2040	4.70266
2045	5.00303
2050	5.11467
2055	5.01203
2060	4.85513
2065	4.79786
2070	4.89567
2075	5.07197
2080	5.17747
2085	5.1433
2090	5.01673
2095	4.91216
2100	4.89875