This graph shows the number of international tourists, in millions, from January to December 2009.
At the start of the year, there were approximately 20 million international tourists. This number rose by 50% in February to about 30 million. The number remained stable until March. Then it grew steadily to 40 million by April and this increase continued to the beginning of May. Between the beginning of May and the beginning of June, there was only a very slight increase, and then a dramatic rise in July and August,, reaching a peak of more than 140 million tourists around the world. Then in September it dropped suddenly to about 100 million, followed by a steady fall to the lowest point in November.. At the end of the year, the number of tourists rose steadily to around 40 million.