[avmich]

The dataset doesn't include options to buy during a good chunk of 1990-s a Proton launch for some $30 millions. That's a carrier with upwards of 20 tons payload capabilities to LEO. Soyuz rocket family also has periods in history when prices were quite low; SpaceX phenomenon touches only the last 10 years at best - and it's in last 10 years when Proton became particularly unreliable and Soyuz maybe more expensive.