Note: Most of those ball drops from 1908-1952 are recreations, also from 1954-56, 1959, and 1961. Edit: You also don't remind that you didn't find 1930 and '31. Edit 2: You didn't even find 1936. Edit 3: You didn't find 1945 since it's WW2 era.
Exactly how were they "recreated" Penalope "computer regeneration"? P.S. 1945 was an important and historic turning point year of the 20th century indeed.