Whose 'calculator' do you trust?

Tourism is down, how much?

Recent headlines proclaim 30 to 50%

• Thailand's protests hit tourism, Chinese arrivals down 50% - Thailand Business News
• (30% cancellations) Indian travellers cut short Thailand story as violence rises again - Business Standard

And now the Official version:

• According to the Ministry of Tourism and Sports’ data  International tourist arrivals to Thailand posted a decline of 4.91%, January to April.

There's some interesting statistical charts of arrivals by country. China and Russia seem to dominate that list.  For April US arrivals seem no longer high enough to be included in the graph