Retrograde periods for Mercury, Venus, Mars, Jupiter and Saturn. Rahu and Ketu are always retrograde by convention.
4 retrograde periods in 1983
20 days in Makara
24 days in Mesha
23 days in Kanya
20 days in Dhanu
1 retrograde period in 1983
139 days in Tula
1 retrograde period in 1983
123 days in Vrishchika
1 retrograde period in 1983
43 days in Simha
Rahu and Ketu are the lunar nodes and are always Vakri (retrograde). They move backwards through the zodiac at roughly 1.5° per month and change Rashi only once every ~18 months.
