Table 5. Grade/Differentiation by Year, 2004-2010.

Year	2004	2005	2006	2007	2008	2009	2010
Grade
Well Differentiated (Code = 1)	2478 (14.8%)	2449 (14.7)	2276 (13.7%)	2175 (12.8%)	2059 (12.1%)	1785 (10.4)	1542 (8.9%)
Intermediate (Code = 2)	5207 (31.1%)	4896 (29.4)	4753 (28.7%)	4659 (27.3%)	4534 (26.6%)	4417 (25.8)	3134 (18.1)
Poorly Differentiated (Code = 3)	4331 (25.9%)	3951 (23.7)	3731 (22.5%)	3514 (20.6%)	3383 (19.8%)	2893 (16.9)	2758 (15.9)
Undifferentiated (Code = 4)	2964 (17.7%)	3478 (20.9)	3955 (23.9%)	4391 (25.8%)	4647 (27.3%)	5084 (29.7)	4719 (27.2)
Not determined, not stated, or not applicable (Code = 9)	1758 (10.5%)	1869 (11.2)	1856 (11.2%)	2316 (13.6%)	2432 (14.3%)	2937 (17.6)	5185 (29.9)
Total Cases	16 738 (100%)	16 643 (100%)	16 571 (100%)	17 055 (100%)	17 055 (100%)	17 116 (100%)	17 338 (100%)