Figure 2.

Time series of Google search queries. Search fractions are rescaled between 0 and 100 by the internal processes of Google Trends upon download, although a logarithmic scale was used to represent the results. Note: Google Trends had two methodological improvements (namely, on 1 January 2011, improvement in geographic allocation, and on 1 January 2016, improvement in data collection). Data source: Google Trends (https://www.google.com/trends, accessed on 20 September 2020). The chart legend indicates the colors for each topic.