When one actually studies the numbers, it becomes clear that there are huge variations in the way that these tourism activities are represented. The total shown for visitors is 3.3 million but the total of the country data on this page is actually 2,152,442. What accounts for the variance?
The biggest variance is for Cuba. Here it shows 527,757 Canadian visitors but according to The Conference Board of Canada, this number is 1,299,980, a difference of 772,223 while Statistics Canada show the figure as 800,000.
Variations appear for the other countries too but this is the most glaring.
Does the number depend on who is gathering the data and which one is accurate?

source:http://www.statcan.gc.ca/tables-tableaux/sum-som/l01/cst01/arts37a-eng.htm and http://veilletourisme.s3.amazonaws.com/2016/06/Outbound-Travel-Outlook-Caribbean-Mexico-2016-2020.pdf