Plot of mmoutcome*Year.  Symbol is value of predictor.                                  	
                                                                                                                                  	
outcome ‚                                                                                                                  	
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           3.2 ˆ                                                                                                                  	
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               ‚1                                                                                                                 	
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           3.0 ˆ                                                                                                                  	
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           2.9 ˆ                                                                                                                  	
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           2.8 ˆ0                                                                                                                 	
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           2.7 ˆ                                                                                                                  	
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           2.6 ˆ                                                                                                                  	
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           2.5 ˆ                                                                                                                  	
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               Šˆƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒˆƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒˆƒ	
                1                                                       2                                                       3 	
                                                                                                                                  	
                                                                       Year                                                       	

proc sort data=data;
by predictor year;
run;
proc means data=data noprint;
by predictor year;
var outcome;
output out=meaned mean=mm outcome;
run;
proc plot data=meaned;
plot mmoutcome*year=predictor;
run;

Model code:	

proc glimmix data=data;
class predictor predictor1 etc etc;
model outcome= year predictor predictor1 etc etc predictor1*year /s dist=multinomial LINK=CUMLOGIT or;
run;
				                estimate sderror df tvalue p-value
Year*predictor	 	 	 	 	 	0	 	 	 	 	 	0.4159	0.1688	765	2.46	0.0140	
Year*predictor	 	 	 	 	 	1	 	 	 	 	 	0	.	.	.	.