Seems like it’s not fake, per se, but the methodology is highly suspect:

Unfortunately, there are 3 major problems with this survey done in 63 countries in 2015

1. it was conducted differently in each country ( face to face, by phone, or via web survey) which impacts the level of honesty with which people answer the question

2. it ignores the cultural approach to precision and shame on the way respondents answer the question (and not only how they behave).

3. Some countries surveyed only urban people, while other surveyed both urban and rural people. Each country also surveyed different age groups.

When asked if they AUTOMATICALLY wash their hands with water and soap after using the toilette, a Dutch man who would use street urinals like this one [link was dead–I grabbed another image and rehosted on Hexbear] just once per year and always wash his hands with soap otherwise, would most likely answer NO. While a French or an Italian would have the exact same behavior would answer YES to the same question because the notion of AUTOMATICALLY is not perceived the same way in each of those countries.

Also, cultures that are more sensitive to guilt or shame will not have the same level of honesty when answering the question, even anonymously from behind a screen. (Even though shame and guilt will most likely also influence their actual behaviour and not only their answer to the survey, it still pollute the result of the survey)

And that’s another major problem of the survey, as it’s has been done differently in each country. Face to face in some, by phone or on the web in others. And it’s pretty obvious that people will more often be embarrassed by saying the truth when asked face to face or by phone than anonymously from behind a screen

More info in PDF in English about the original survey here

Another link wich is visually easier to read but the country names are written in French (as the rest of the document) and only slides 4 and 9 are relevant for the global results.

(reddit source)