12 January 1980 | 2 April 1980 | 20 June 1980 |
16 July 1980 | 30 August 1980 | 11 September 1980 |
13 October 1980 | 20 November 1980 | 26 November 1980 |
20 January 1981 | 2 March 1981 | 2 April 1981 |
10 June 1981 | 21 July 1981 | 29 September 1981 |
10 December 1981 | 8 July 1982 | 2 August 1982 |
15 November 1982 | 16 March 1983 | 23 March 1983 |
18 April 1983 | 6 May 1983 | 27 July 1983 |
8 September 1983 | 7 October 1983 | 27 October 1983 |
13 December 1983 | 7 January 1984 | 3 February 1984 |
4 February 1984 | 5 May 1984 | 4 July 1984 |
11 October 1984 |