What grade would you give the Lab Attendants overall?
	Fall 09	Spring 10	Fall 10	Spring 11	Fall 11	Spring 12
A+	10.6%	8.60%	11.0%	7.70%	9.20%	8.70%
A	27.0%	22.90%	31.1%	29.30%	29.50%	27.20%
A-	18.7%	17.10%	15.3%	18.30%	16.10%	10.90%
B+	13.2%	13.60%	15.1%	15.40%	18.00%	14.10%
B	15.2%	16.40%	12.8%	12.20%	12.40%	9.80%
B-	4.6%	6.40%	4.6%	3.90%	4.60%	8.70%
C+	2.9%	4.30%	3.4%	5.80%	2.80%	8.70%
C	2.9%	5.00%	3.9%	4.20%	2.30%	3.30%
C-	2.3%	1.40%	0.9%	1.30%	1.80%	2.20%
D+	0.9%	2.10%	0.9%	0.30%	0.50%	3.30%
D	0.9%	2.10%	0.2%	1.30%	2.30%	0.00%
D-	0.3%	0.00%	0.5%	0.30%	0.00%	1.10%
F	0.6%	0.00%	0.2%	0%	0.50%	2.00%