1981,1982,1982,1983,1984,1984,1985,1986,1986,1987,1988,1988,1988,1989,1989,1989,1989,1990,1990,1991,1991,1992,1992,1991,1991,1990,1989,1989,1988,1988,1988,1987,1986,1986,1985,1984,1984,1983,1982,1982,1981,1981,1981,1981;829,829,828,828,828,827,827,827,828,828,828,829,830,830,831,832,833,833,834,834,835,835,836,836,837,837,837,836,836,835,834,834,834,833,833,833,832,832,832,831,831,830,829,829