
The Berlin Wall was a guarded concrete barrier that physically divided Berlin from 1961 to 1989. Constructed by the German Democratic Republic, starting on 13 August 1961, the Wall cut off West Berlin from virtually all of surrounding East Germany and East Berlin until government officials opened it in November 1989.
Before the Wall's erection, 3.5 million East Germans circumvented Eastern Bloc emigration restrictions and defected from the GDR, many by crossing over the border from East Berlin into West Berlin; from there they could then travel to West Germany and to other Western European countries. Between 1961 and 1989 the Wall prevented almost all such emigration.
https://en.wikipedia.org/wiki/Berlin_Wall
Estimates are that some 5,000 East berliners made it through the wall to the West
Is that so, grandpa? So in 28 years, fewer than 200 people a year made it over/under the wall. Sounds acceptable to me.