| 1981 |  Jan/Feb |
 Mar/Apr |
 May/Jun |
 Jul/Aug |
 Sep/Oct |
 Nov/Dec |
| 1982 |  Jan/Feb |
 Mar/Apr |
 May/Jun |
 Jul/Aug |
 Sep/Oct |
 Nov/Dec |
| 1983 |  Jan/Feb |
 Mar/Apr |
 May/Jun |
 Jul/Aug |
 Sep/Oct |
 Nov/Dec |
| 1984 |  Jan/Feb |
 Mar/Apr |
 May/Jun |
 Jul/Aug |
 Sep/Oct |
 Nov/Dec |
| 1985 |  Jan/Feb |
 Mar/Apr |
 May/Jun |
Jul/Aug |  Sep/Oct |
Nov/Dec |
| 1986 |  Jan/Feb |
Mar/Apr |  May/Jun |
 Jul/Aug |
Sep/Oct | Nov/Dec |
| 1987 | Jan/Feb |