Just One-Tenth of Workers Have Landed Their Childhood Dream Jobs
Actually, less than one-tenth. That is not a surprising number, if you think about it for more than a minute. A LinkedIn survey has that result (Source). This is significantly different from job satisfaction - this really goes on to reflect the opportunities that the education system and employment situation provides to people.
But wait a minute, Paul Graham says you should NOT follow your childhood dream job.
"A friend of mine who is a quite successful doctor complains constantly about her job. When people applying to medical school ask her for advice, she wants to shake them and yell "Don't do it!" (But she never does.) How did she get into this fix? In high school she already wanted to be a doctor. And she is so ambitious and determined that she overcame every obstacle along the way—including, unfortunately, not liking it.
Now she has a life chosen for her by a high-school kid."