1998,1997,1997,1996,1996,1997,1996,1995,1994,1993,1992,1991,1990,1989,1989,1990,1990,1992,1992,1991,1990,1991,1992,1994,1995,1996;852,850,849,848,847,845,844,843,843,842,842,843,841,842,844,845,847,848,850,851,853,853,854,854,853,853