I have made a spreadsheet of the REPORTED number in attendance to the Memorial since the first report of 13 people appeared in an 1896 Watchtower.
Since it can be very hard to find the numbers for the early years (anything previous to 1938), I will slowly make a note of where I found the data.
Some of the years I had to manually add hundreds of entries, since the WT did not provide the full number.
I am building on the statistics of 1988-2013 that appeared here a while ago.
Soon I will be starting this but for other sets of data: # of publishers, hours, etc...
Here is the link: LINK