The graph illustrates how many travellers visited Australia from distinct continents throughout the period of 9 years. (over the course of nine years).
Overall, more people started to come from all continents by the end of the timeframe. Moreover, the figure for Africa was equal to zero for most of the given period.
Turning to the details, in 1990, the figure for Europe was the highest and stood at 2 million, while that for North America opened the period at approximately 1.3 million. In the next three years, the former increased to nearly 2.8 million, before declining back to its initial value. By contrast, the latter remained relatively stable. Between 1993 and 1997, more people started to come from Europe until their count reached roughly 3.5 million. Similarly, the number of tourists from North America sharply increased to hit its peak at around 4 million people. By 1999, both of these figures converged at exactly 4 million.
Considering other continents, the figure for Asia registered half a million in the beginning, while that for Africa was at the baseline. For the next five years, the former stayed similar before rising significantly to 1.5 million, as opposed to the latter which retained its value. After 1995, the number of tourists from Asia kept growing, until it stopped at around 2.4 million. Similarly, the count of African visitors increased noticeably before leveling off at 0.5 million.