1980  170.7  208.0  0
1981  173.1  212.1  0
1982  180.8  217.0  0
1983  186.8  222.6  0
1984  191.6  227.7  0
1985  197.9  234.5  0
1986  204.8  242.7  0
1987  213.6  247.8  0
1988  224.9  258.5  0
1989  235.6  270.6  0
1990  246.2  280.1  0
1991  252.1  290.3  1
1992  257.4  296.3  1
1993  260.0  300.1  1
1994  265.3  306.0  1
1995  270.6  313.6  1
1996  278.6  321.5  1
1997  279.8  320.3  1
1998  277.7  320.5  1