The code below adds a numeric date column (assumes 1st of every month) and creates a graph using Graph Builder.
dt = data table("CancerIS_JMP");
dt << New Column( "Month Dt",
Numeric,
"Continuous",
Format( "ddMonyyyy", 10 ),
Input Format( "ddMonyyyy" ),
Formula( Informat( :Month || "-01", "yyyy-mm-dd" ) )
);
gb = dt << Graph Builder(
Size( 530, 452 ),
Show Control Panel( 0 ),
Variables( X( :Month Dt ), Y( :IS ), Overlay( :Cancer Type ) ),
Elements( Line( X, Y, Legend( 15 ) ), Points( X, Y, Legend( 16 ) ) )
);
You can do a visual inspection to see there are any upward trends. If you need something more quantitative you could fit a model.