LinePlot: add ratio of applied and issued to tooltip

src/Views/LinePlot.elm

@@ -276,6 +276,21 @@ view global model =
                                         )
                                     ]
                             )
+
+                rate = annotation
+                    |> Maybe.map
+                        (Tuple.first
+                            >> .selection
+                            >> .y
+                        )
+                    |> Maybe.withDefault []
+                    |> List.map
+                            (\{ groupLabel, value } ->
+                                value
+                            )
+                    |> List.foldl (\x y -> x / y) 1.0
+                    |> String.fromFloat
+                    |> String.left 5
             in
             Html.div
                 [ Html.Attributes.style "margin" "0"
@@ -293,6 +308,8 @@ view global model =
                 [ Html.text year
                 , Html.br [] []
                 , Html.div [] values
+                , Html.br [] []
+                , Html.text ("ratio: " ++ rate)
                 ]