|Linguistic and Cultural science||32|
|Science of education, sport||20|
|Agriculture, forestry and nutrition science||7|
|Dental and veterinary medicine||3|
The data is for the year of 2006, it is averaged over several years in which the students might have started and includes only German students.
I was surprised that the rate in mathematics is not higher. Sitting in a classroom that was a little emptier every week, it certainly seemed higher to me (in 1995). Though my estimate would have included those who had taken mathematics as a minor field of study, so the rate was probably indeed higher. I have no idea what's wrong with linguistic. And I would have expected the dropout rate in medicine to be vastly higher.
For some fields there is data for men and women separately. In almost all cases where there is data, the dropout rate among women is lower than among men. The one exception is medicine, where women drop out in a higher fraction.
It would be interesting to compare these rates to countries in which there are tuition fees to see if it makes a large difference in commitment. If somebody has a reference, please let me know in the comments.