old_contents: from django.conf.urls import url
  from Overlay import views
  
  urlpatterns = [
      url(r'^$',
          views.basic,
          name='basic'),
      
      url(r'^(?P<cnty>[^0-9]+)/$',
          views.year,
          name='years'),
      
      url(r'^(?P<cnty>[^0-9]+)/(?P<yr>[0-9]{4})/$',
          views.att,
          name='attribute'),
  
      url(r'^(?P<cnty>[^0-9]+)/(?P<yr>[0-9]{4})/(?P<fld>[^0-9]+)/$',
          views.table,
          name='table'),
  ]
  
new_contents: from django.conf.urls import url
  from Overlay import views
  
  urlpatterns = [
      url(r'^$',
          views.main,
          name='main'),
  
      url(r'^custom/$',
          views.custom,
          name='custom'),
      
      url(r'^custom/(?P<cnty>[^0-9]+)/$',
          views.year,
          name='years'),
      
      url(r'^custom/(?P<cnty>[^0-9]+)/(?P<yr>[0-9]{4})/$',
          views.att,
          name='attribute'),
  
      url(r'^custom/(?P<cnty>[^0-9]+)/(?P<yr>[0-9]{4})/(?P<fld>[^0-9]+)/$',
          views.table,
          name='table'),
  ]
  
subject: Update urls.py