    
   extendData: ->
     years = [@year...(@year+@numYears)]
-    offsets = years.map (x) -> Math.round(20*(Math.random()-0.65))
+    offsets = years.map (x) -> Math.round(20*(Math.random()-0.5))
     start = @numCranes
     newVals = offsets.reduce ((l, r) -> l.concat([Math.max(0, l[l.length-1]+r)])), [start]
     firstZero = newVals.indexOf(0)

  numYears: 100
  runNumber: 0
  chart: null
  hoverDetail: null
  
  constructor: ->
    @values = []

      series: @values
      min: 'auto'
    })
    xAxis = new Rickshaw.Graph.Axis.X({
      graph: @chart
    })
    yAxis = new Rickshaw.Graph.Axis.Y({
      graph: @chart
    })
    hoverDetail = new Rickshaw.Graph.HoverDetail({
      graph: @chart
      xFormatter: (year) -> "Year #{year}"
      yFormatter: (numCranes) -> "#{Math.round(numCranes)} cranes"
