Traffic, commercial air carriers =

1973/1977; 1973/1978; 1975/1979; no.37;39(1973-1979); 1975/1980; 1976/1980; 1977/1981; 1977/1982; 1978/1982; no.41-42(1977-1982); 1979/1983; 1979/1984; 1980/1984; 1981/1985; no.40;45(1976-1985); 1981/1986; 1982/1986; 1983/1987; no.46-47(1982-1987); 1983/1988; 1984/1988; 1985/1989; no.48-49(1984-1989); 1986/1990; 1988/1992; no.51-52(1987-1992); 1989/1993; no.53-54(1989-1994); (1996-2000); no.55(1991-1995); no.57(1993-1997); no.58(1994-1998); no.59(1995-1999); suppl.