Global Warming according to the Economist

Got my new Economist in this morning's mail.  Cover is a clever climate graph, so clever that I had to read the article to understand the graph.  Anyhow the Economist graph shows global warming only starting in the 1990s and getting really hot in the 2010's.  .  Everything is cool  from the beginning of time (of graph) (1850) until the 1990's.   Trouble is, that is wrong.  NASA's Goddard Institute for Space Studies (GISS) has temperature records going back to the invention of the thermometer ( late 1600's).  I downloaded the records some years ago and graphed them out with Excel.  Global warming flattened out in the 1990s and has remainded flat to this day.  Dunno where the Economist got their data, but there is a publicly available database from a reasonably reliable institution that does not support the Economist's colorful cover graph.