Est. 1990 0.533908 1.872981 3.8744% 1988 0.534554 1.870720 3.3218% 1987 1.058611 0.944634 3.1640% 1986 15.804676 0.063272 2.6144% 1985 14.785946 0.067632 2.9715% 1984 7.804496 0.128131 3.6576% 1983 6.880694 0.145334 3.8998% 1982 1.385043 0.721999 6.3831% 1981 5.340855 0.187236 9.6843% 1980 5.870053 0.170356 9.0330% 1979 2.585522 0.386769 8.8650% 1978 4.845760 0.206366 7.2813% 1977 9.219384 0.108467 6.6558% 1976 1.917924 0.521397 6.4073% 1975 0.550606 1.816181 9.8159% 1974 0.574466 1.740747 9.0909% 1973 0.629765
niches