Trends
World Population.xlsx is included in the Chapter 09 directory. It contains one record for each country for each year from 1960 to 2015, measuring population. Using this dataset, let's take a look at the historical trends of various countries. Create a view similar to the one shown in the following screenshot, which shows the change in population over time for Afghanistan and Australia. You'll notice that Country Name has been filtered to include only Afghanistan and Australia and the field has additionally been added to the Color and Label shelves:
Figure 9.1: Population values for Afghanistan and Australia over time
From this visualization alone, you can make several interesting observations. The growth of the two countries' populations was fairly similar up to 1980. At that point, the population of Afghanistan went into decline until 1988, when it started to increase. At some point around 1996, the population of Afghanistan exceeded that of Australia...
