diff --git a/htdocs/core/boxes/box_graph_invoices_permonth.php b/htdocs/core/boxes/box_graph_invoices_permonth.php
index 983bb75cbc3..71c750c3e73 100644
--- a/htdocs/core/boxes/box_graph_invoices_permonth.php
+++ b/htdocs/core/boxes/box_graph_invoices_permonth.php
@@ -120,7 +120,8 @@ class box_graph_invoices_permonth extends ModeleBoxes
 			if (empty($shownb) && empty($showtot)) { $shownb = 1; $showtot = 1; }
 			$nowarray = dol_getdate(dol_now(), true);
 			if (empty($endyear)) $endyear = $nowarray['year'];
-			$startyear = $endyear - 1;
+			$startyear = $endyear - (empty($conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH) ? 1 : $conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH);
+
 			$mode = 'customer';
 			$WIDTH = (($shownb && $showtot) || !empty($conf->dol_optimize_smallscreen)) ? '256' : '320';
 			$HEIGHT = '192';
diff --git a/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php b/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php
index 1490f5ea6e9..e249900afab 100644
--- a/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php
+++ b/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php
@@ -117,7 +117,8 @@ class box_graph_invoices_supplier_permonth extends ModeleBoxes
 			if (empty($shownb) && empty($showtot)) { $shownb = 1; $showtot = 1; }
 			$nowarray = dol_getdate(dol_now(), true);
 			if (empty($endyear)) $endyear = $nowarray['year'];
-			$startyear = $endyear - 1;
+			$startyear = $endyear - (empty($conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH) ? 1 : $conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH);
+
 			$mode = 'supplier';
 			$WIDTH = (($shownb && $showtot) || !empty($conf->dol_optimize_smallscreen)) ? '256' : '320';
 			$HEIGHT = '192';
diff --git a/htdocs/core/boxes/box_graph_orders_permonth.php b/htdocs/core/boxes/box_graph_orders_permonth.php
index d9c26620553..df6a9f5c18e 100644
--- a/htdocs/core/boxes/box_graph_orders_permonth.php
+++ b/htdocs/core/boxes/box_graph_orders_permonth.php
@@ -120,7 +120,8 @@ class box_graph_orders_permonth extends ModeleBoxes
 			if (empty($shownb) && empty($showtot)) { $shownb = 1; $showtot = 1; }
 			$nowarray = dol_getdate(dol_now(), true);
 			if (empty($endyear)) $endyear = $nowarray['year'];
-			$startyear = $endyear - 1;
+			$startyear = $endyear - (empty($conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH) ? 1 : $conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH);
+
 			$mode = 'customer';
 			$WIDTH = (($shownb && $showtot) || !empty($conf->dol_optimize_smallscreen)) ? '256' : '320';
 			$HEIGHT = '192';
diff --git a/htdocs/core/boxes/box_graph_orders_supplier_permonth.php b/htdocs/core/boxes/box_graph_orders_supplier_permonth.php
index 765c6324516..eda3d32f250 100644
--- a/htdocs/core/boxes/box_graph_orders_supplier_permonth.php
+++ b/htdocs/core/boxes/box_graph_orders_supplier_permonth.php
@@ -119,7 +119,8 @@ class box_graph_orders_supplier_permonth extends ModeleBoxes
 			if (empty($shownb) && empty($showtot)) { $shownb = 1; $showtot = 1; }
 			$nowarray = dol_getdate(dol_now(), true);
 			if (empty($endyear)) $endyear = $nowarray['year'];
-			$startyear = $endyear - 1;
+			$startyear = $endyear - (empty($conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH) ? 1 : $conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH);
+
 			$mode = 'supplier';
 			$WIDTH = (($shownb && $showtot) || !empty($conf->dol_optimize_smallscreen)) ? '256' : '320';
 			$HEIGHT = '192';
diff --git a/htdocs/core/boxes/box_graph_propales_permonth.php b/htdocs/core/boxes/box_graph_propales_permonth.php
index de1a1f8de83..7ca9740d8e5 100644
--- a/htdocs/core/boxes/box_graph_propales_permonth.php
+++ b/htdocs/core/boxes/box_graph_propales_permonth.php
@@ -120,7 +120,8 @@ class box_graph_propales_permonth extends ModeleBoxes
 			if (empty($shownb) && empty($showtot)) { $shownb = 1; $showtot = 1; }
 			$nowarray = dol_getdate(dol_now(), true);
 			if (empty($endyear)) $endyear = $nowarray['year'];
-			$startyear = $endyear - 1;
+			$startyear = $endyear - (empty($conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH) ? 1 : $conf->global->MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH);
+
 			$WIDTH = (($shownb && $showtot) || !empty($conf->dol_optimize_smallscreen)) ? '256' : '320';
 			$HEIGHT = '192';