We would probably get broadly similar curves if we plotted the number of words in the regulations against many other factors. Examples might include number of aircraft flying, size of the aviation industry, value of the world aviation industry, engine fuel efficiency, navigation system accuracy, number of semiconductors in a microchip, or even the amount of money wasted by the EU.
Surely the more important factor is to determine what if any is the link between the two trends. The very act of plotting number of words against MTOW or number of seats may lead some people to think that there is a direct link between the two.