At the start of every course, I like to give breakdowns of course grades in my recent offerings of that course.  Here they are for ECS 158:

Spring 2016 ECS 158

A A- A+  B B- B+  C C- C+ 
4  9  8  7  3  8  2  1  2 

Winter 2015 ECS 158

A A- A+  B B- B+  C C- C+ 
7  7  5  8  3 14  1  1  2 

ECS 158, being an elective course, consists mainly of students who like programming and have chosen to be there.  Look at all those A+!

By contrast, the grades in my ECS 132, required for CSE majors, are not as skewed to the high end:

Winter 2017 ECS 132

 A A- A+  B B- B+  C C- C+  D D- D+  Y 
10  6  5 12 10 16  6  1 10  1  3  1  2 

Norm