1989  12.9  28.4   6.3  15.7
 1990  43.7  58.3  31.2  61.6
 1991  22.5  54.4  15.5  12.7
 1992  15.5  33.5  12.3   7.8
 1993  13.6  42.4   7.1   5.0
 1994  73.6  95.5  68.3  67.7
 1995  11.5  38.0   4.2   6.7