As a follow up to the "Are Grand Prixs Rare?" thread here are the production numbers from 1978-1987 according to PHS (Pontiac Historical Society)...
1978
Base 127253
SJ 36069
LJ 65122
Total 228444
1979
Base 124815
SJ 24060
LJ 61175
Total 210050
1980
Base 72659
SJ 7087
LJ 34968
Total 114714
1981
Base 74786
LJ 46842
Brougham 26083
Total 147711
1982
Base 37672
LJ 29726
Brougham 12969
Total 80367
1983
Base 41511
LJ 33785
Brougham 10502
Total 85798
1984
Base 36893
Brougham 9514
LE 31037
Total 77444
1985
Base 30365
Brougham 8223
LE 21195
Total 59783
1986
Base 21668
Brougham 4798
LE 13918
Total 40384*
* includes 1225 GP 2+2's
1987
Base 8599
Brougham 1717
LE 6226
Total 16542
1978
Base 127253
SJ 36069
LJ 65122
Total 228444
1979
Base 124815
SJ 24060
LJ 61175
Total 210050
1980
Base 72659
SJ 7087
LJ 34968
Total 114714
1981
Base 74786
LJ 46842
Brougham 26083
Total 147711
1982
Base 37672
LJ 29726
Brougham 12969
Total 80367
1983
Base 41511
LJ 33785
Brougham 10502
Total 85798
1984
Base 36893
Brougham 9514
LE 31037
Total 77444
1985
Base 30365
Brougham 8223
LE 21195
Total 59783
1986
Base 21668
Brougham 4798
LE 13918
Total 40384*
* includes 1225 GP 2+2's
1987
Base 8599
Brougham 1717
LE 6226
Total 16542