1987.5  -30.959
1987.6  -18.659
1989.7   15.804
1989.9  -32.279
1990.9  -20.118
1991.7   49.172
1992.0   68.162
1992.7   25.572
1992.9   87.665
1993.0  -35.996
1993.1  -30.409
1993.2  -18.117
1993.7  -37.187
1993.8  -31.601
1995.0   51.077
1995.9   30.846
1996.0   17.404
1996.1   28.552
1996.2  -11.705
1996.3  -15.070
1996.8  -41.980
1996.9  -31.914
1997.1  -27.461
1997.2  -11.808
1997.3  -62.218