A quick review of the ATF records I could find showed:
Guns built in 2000, 2001, 2002, 20003, nothing I can find for 2004, more guns in 2005, 2006, 2007, 2008, 2009, 2010. Been working with the ATF for decades...mistakes makes perfect sense to me as does poor book keeping and reporting by a manufacture.
Here is what I have found in the past according to the reported numbers via ATF public records for US Firearms revolvers by caliber.
1997 to 1999 not found
2000
.22-0
.32-7
.357-0
.38-49
.44-49
.45-589
2001
.22-0
.32-10
.357-0
.38-43
.44-41
.45-927
2002
.22-0
.32-14
.357-0
.38-130
.44-23
.45-1004
2003
.22-0
.32-10
.357-0
.38-441
.44-1031
.45-472
2004 (not found)
.22-
.32-
.357-
.38-
.44-
.45-
2005
.22-41
.32-20
.357-0
.38-299
.44-354
.45-1832
2006
.22-32
.32-19
.357-0
.38-573
.44-268
.45-1331
2007
.22-60
.32-710
.357-1
.38-1693
.44-1361
.45-3279
2008
.22 - 3003
.32 - 31
.357 - 19
.38 - 619
.44 - 417
.50 - 4245
2009
.22-198
.32-17
.357-24
.38-220
.44-228
.45-895
2010
.22-1573
.32-141
.357-7
.38-1208
.44-1738
.45-7350
2011
.22-10
.32-0
.357-0
.38-5
.44-14
.45-19
Not that these number actually mean anything...but a few totals anyway.
.22-4914
.32-989
.357-51
.38-5280
.44-5524
.45-21943
38,701
I am terrible at transposing numbers so please let me know when you find a mistake.
Nothing specific listed in .30 Carbine which is a true .308. Nothing specific on the 38WCF or the .41 Colt either. Both .40 cal.
Fact is.... every one is guessing on numbers built/caliber and date of production by serial numbers (or who actually manufactured the revolver Uberti or USFA) until the original bound books are examined and then published in detail.
*edited several times for clarity and earlier mistakes/misrepresentations*