While perusing QST for September, 1961, I came across the following..

In 1961, ARRL's BoD conducted a survey of band/mode use of 8000 hams
(membership and license class not specified). Results (operating time):

HF:
CW: 34.4%
AM: 27.8%
SSB: 23.3%
RTTY: 1.5%
FM/NBFM: 0.3%
Other modes: 0.6%

VHF/UHF (all modes): 12.1%

73 de Jim, N2EY