It's a little fact that irritates the globull people when I ask then what happened before then.
Also, if you track all tornadoes on a graph you will see a bump happening around 1988.
Why? Introduction of doppler radar enabled us to capture the smaller spin up tornadoes.
I always ask them how they know the temperature over the last 1000 years to an accuracy of tenths of a degree, by tree rings.
Most are too stupid to understand the question.