The line graph compares the percentage of people in three countries who used the Internet between 1999 and 2009.
It is clear that the proportion of population who used the Internet increased in each country over the period shown. In general, a much larger percentage of Canadians and Americans had access to the internet in comparison to Mexicans, and Canadians experienced the fastest growth in Internet usage.
In 1999, the proportion of people using the Internet in the USA was about 20%. The figures for Canada and Mexico were lower, at about 10% and 5% respectively. In 2005, Internet usage in both the USA and Canada rose to around 70% of the population, while the figure for Mexico reached just over 25%.
By 2009, the percentage of Internet users was highest in Canada. Almost 100% of Canadians used the Internet, compared to about 80% of Americans and only 40% of Mexicans.
The graph shows the trend of the migration from foreign countries to UK between 1999 and 2008.
It is clear that there were lots of fluctuations in terms of immigration, emigration and net migration in UK during the period shown, the proportion of people immigrating to UK was highest. While the number of people immigrating to UK reached a peak at the end, the figures of net decreased within surveyed time.
In 1999, whereas the figures of immigration and emigration were approximately 450 thousand people and about 280 thousand people respectively, the one of Net was around 170 thousand people. In 2004, despite of the strong growths of net migration and immigration, emigration went down at the moment.
In 2008, although the proportion of immigration peaked at about 590 thousand people and 480 thousand people respectively, the figure of net dropped to around 180 thousand people, after approaching a peak of over 220 thousand people in the previous year.
The line chart gives information in relation to acid rain caused by emission from four sectors such as...