Here's total challenger numbers produced to some degree.
About 165,500 Challengers were sold over this model's lifespan.
1970 = 76,935 *includes 2,539 T/As
Hardtop I6: 9,929
Hardtop V8:. 39,350*
Sports hardtop I6: 350
Sports hardtop V8: 5,873
Convertible I6: 378
Convertible V8: 2,543
Hardtop R/T: 13,796
Special Edition hardtop R/T: 3,753
Convertible R/T: 963
1971 = 26,299
Hardtop I6: 1,672
Hardtop V8: 18,956
Convertible I6: 83
Convertible V8: 1,774
Hardtop V8 R/T: 3,814
1972 = 22,919
Hardtop I6: 842
Hardtop V8: 15,175
Hardtop V8 Rallye: 8,123
1973 = 27,930
Note: All models were V8-powered hardtops
1974 = 11,354
Note: All models were V8-powered hardtops
Under 115,000 cuda/barracudas built
1970 48,867
71 16,492
72 18,490
73 19,281
74 11,734
So you can figure if you own an E body, you are one of a handfull left in todays time