That is called statistics :) Thanks for this info.
In 1980 we had 4,439,632,464 people living here on earth :) :
2600 000 people died of Measles
In 2015 we had 7,349,472,099 people
134 200 people died of measles
Well I could say it is necessary to vaccinate or am I exaggerating right now? :p
Having more vaccinated people in a society reduces the amount of people of that society dying from the illness vaccinated against - You can surely say that :)