Hmm... Very interesting. Much different than the class sizes I remember from my one and only year of education in the US. Also, very nice if true. I can't q

Hmm... Very interesting. Much different than the class sizes I remember from my one and only year of education in the US. Also, very nice if true. I can't quite understand the data, though. In the description for self-contained and departmentalised the percentages don't even come close to adding up to 100%. Are there other styles of teaching whose data is not represented on this chart?