Create academic year checkbox selectors. Refresh page with years selected on

checkbox change.  Draw bar graphs for each academic year selected.
Center bar graphs in their column.  Color the columns to match the
sample colors on the checkboxes.  Add scores on beta to top of graph.
Automatically display the most recent year of data for the district.
Modify logic for the insufficient data message or the 'measure not based
on student/teacher surveys' message so it only shows if there are no
bars with data to display.

app/helpers/analyze_helper.rb

@@ -27,22 +27,22 @@ module AnalyzeHelper
     1
   end
 
-  def grouped_chart_width
+  def grouped_chart_column_width
     graph_width / data_sources
   end
 
-  def grouped_chart_divider_x(position)
-    zone_label_width + (grouped_chart_width * position)
+  def column_end_x(position)
+    zone_label_width + (grouped_chart_column_width * position)
+  end
+
+  def column_start_x(position)
+    column_end_x(position - 1)
   end
 
   def bar_label_height
     (100 - ((100 - analyze_graph_height) / 2))
   end
 
-  def bar_label_x(position)
-    zone_label_width + (grouped_chart_width * position) - (grouped_chart_width / 2)
-  end
-
   def analyze_zone_height
     analyze_graph_height / 5
   end
@@ -66,4 +66,8 @@ module AnalyzeHelper
   def analyze_subcategory_link(district:, school:, academic_year:, category:, subcategory:)
     "/districts/#{district.slug}/schools/#{school.slug}/analyze?year=#{academic_year.range}&category=#{category.category_id}&subcategory=#{subcategory.subcategory_id}"
   end
+
+  def colors
+    @colors ||= ['#49416D', '#FFC857', '#920020', '#00B0B3', '#B2D236', '#595959']
+  end
 end

app/helpers/color_helper.rb

@@ -0,0 +1,2 @@
+module ColorHelper
+end