Change order of writing graphs in taxcalcio.py module

taxcalc/taxcalcio.py

@@ -672,6 +672,15 @@ def write_graph_files(self):
         """
         pos_wght_sum = self.calc.total_weight() > 0.0
         fig = None
+        # percentage-aftertax-income-change graph
+        pch_fname = self._output_filename.replace('.csv', '-pch.html')
+        pch_title = 'PCH by Income Percentile'
+        if pos_wght_sum:
+            fig = self.calc_base.pch_graph(self.calc, pop_quantiles=False)
+            write_graph_file(fig, pch_fname, pch_title)
+        else:
+            reason = 'No graph because sum of weights is not positive'
+            TaxCalcIO.write_empty_graph_file(pch_fname, pch_title, reason)
         # average-tax-rate graph
         atr_fname = self._output_filename.replace('.csv', '-atr.html')
         atr_title = 'ATR by Income Percentile'
@@ -694,15 +703,6 @@ def write_graph_files(self):
         else:
             reason = 'No graph because sum of weights is not positive'
             TaxCalcIO.write_empty_graph_file(mtr_fname, mtr_title, reason)
-        # percentage-aftertax-income-change graph
-        pch_fname = self._output_filename.replace('.csv', '-pch.html')
-        pch_title = 'PCH by Income Percentile'
-        if pos_wght_sum:
-            fig = self.calc_base.pch_graph(self.calc, pop_quantiles=False)
-            write_graph_file(fig, pch_fname, pch_title)
-        else:
-            reason = 'No graph because sum of weights is not positive'
-            TaxCalcIO.write_empty_graph_file(pch_fname, pch_title, reason)
         if fig:
             del fig
             gc.collect()