The below statistics were obtained from data gleened from QRZ.com. Some of the calls in the VUCC standings are not available for whatever reason from QRZ. Multiple VUCC grid activations for same call were not used, only the "home grid square"
VUCC by Country

Antarctica . 1

Argentina . 2
Australia . 1
Austria . 1
Azerbaijan . 1
Azores . 1
Bangladesh    . 1
Brazil    . 15
Canada . 18
Chile . 1
Costa Rica       . 2
Cuba    . 2
El Salvador . 1
England    . 6
France    . 2
Germany       . 14
Greece    . 1
Guadeloupe . 1
Guernsey    . 1
Hong Kong    . 1
India    . 2
Italy       . 8
Japan          . 3
Mexico       . 14
Northern Ireland . 1
Norway       . 1
Panama    . 1
Poland    . 1
Portugal    . 2
Puerto Rico       . 2
Romania . 1
Russia    . 2
Slovenia    . 1
South Africa        . 2
Spain    . 6
Switzerland . 2
United Arab Emirates . 1
United States    . 386
Venezuela . 1
West Malaysia    . 1