Here are the values of B at the center (z and x=0).

  Y (inch)     	B (T)
-1.75  		0.301
-1.5   		0.315
-1.25  		0.325
-1.0   		0.328
-0.5   		0.331
 0.0   		0.331
+0.5   		0.331
+1.0   		0.327
+1.25  		0.324
+1.5   		0.315
+1.75  		0.294

Integrated Strenght at x=y= 0 

0.318 T-m