You're right, the Caribbean region was not covered by any of the existing links:
https://developers.google.com/chart/interactive/docs/gallery...
Should be fixed now.
The answer regarding Zimbabwe is Liquid Telecom:
http://www.techzim.co.zw/2016/10/zimbabwe-leads-africa-ipv6-...
Mind you on a country by country basis Belgium has cleared 50% with Greece clearing 30%.
Heartening to see Zimbabwe pass 7%, an anomaly for the whole of Africa, does anyone know whats going on there? Egypt is second with 0.50%.
The map isn't set up for the Caribbean, although if you check the json used for the website Trinidad comes is at 12%. An egregious omission .
https://www.google.com/intl/en_ALL/ipv6/statistics/data/worl...
Perhaps I need to start a fantasy ipv6 migrarion website...