Chapter 3 - Google Correlate example update

In Chapter 3 on Page 87, the book refers to the Google Correlate service. However, as of December 2019, the service has been shutdown. Since the chapter requires you to download a CSV formatted data, it is no longer possible. However, you can instead download a version of the data that I had used 5 years back when writing the book from here.

Thanks to a reader for pointing me to this issue.