• In 1994, the United States, Russia, and Ukraine signed the Trilateral Statement, under which Ukraine committed to eliminate all nuclear weapons on its territory and join the NPT, in exchange for economic support and security assurances from the United States and Russia.

Yeah, would have been nice if the word (signature in fact!) of us government had meant anything (we knew russia never lives up to it)

Number of trips sounds more reasonable. It will show the odds of completing a trip for different means of transport