This diagram contains the data about the flows of visitors to several major regions of the world.
The most remarkable point is that two regions that initially remained unpopular among tourists are Sub-Saharan and South Africa. By contrast, having more sight-seeing and a developed economy, North America had a high inflow of tourists in the last decade of the twentieth century, counting around 70 millions of tourists visiting this region this year. Another fact worth noticing is that South-East Asia and Central and Eastern Europe had moderate numbers of guests arrivals.
While starting with different numbers of people visiting their countries, while we compare given parts of the world in terms of further developments there are several noticeable changes. For instance, North America had a quite huge number of guests visiting this region, by the end of the twentieth century, the rates of tourist inflows remained on the same level. By contrast, Central and Eastern Europe faced the most noticeable increase between 1990 and 2005. During this period, the rates of visitors tripled, which marked the uprising tendency compared to other continents. It can also be seen that the rest of the continents had a flat increase during this time.
In conclusion, while South America had quite a high number of guests arriving in this region, the overall trend in following years is much flatter than in Central and Eastern Europe. The remain continents have relatively flat increase from 1990 to 2005.