What are you going to do with all the data?There is an incredible amount of things you can do once you have the data. For example, in what year were the witnesses covering the most/minimum amount of landmass of the Earth? There are some years, for example, where Russia and China were reporting. Easily the year in which the least number of countries reported was 1942.
Once we have access to all of the data in digital form, there is sooooo much that is possible to analyze!!