And how much of that would be changed by the Invasion? Sure, it failed, but it also hurt some countries pretty badly, the UK in particular.
Dunno. I had been assuming that the Invasion focused on the population centers, in order to deal a "knockout blow"... the ten largest cities in 1900 were:
London, United Kingdom 6,480,000
New York, United States 4,242,000
Paris, France 3,330,000
Berlin, Germany 2,707,000
Chicago, United States 1,717,000
Vienna, Austria 1,698,000
Tokyo, Japan 1,497,000
St. Petersburg, Russia 1,439,000
Manchester, United Kingdom 1,435,000
Philadelphia, United States 1,418,000
But we've also had 10 years to recover, so I don't know how to reflect the impact of the Martians...