   .style("top", (d3.mouse(this)[1]+30) + "px")
  }
  var mousemove = function(d) {
    tooltip
      .style("left", (d3.mouse(this)[0]+30) + "px")
      .style("top", (d3.mouse(this)[1]+30) + "px")
  }
  var mouseleave = function(d) {
    tooltip
      .transition()
      .duration(200)
      .style("opacity", 0)
  }

  // Add individual points with jitter
  var jitterWidth = 50
  svg
    .selectAll("indPoints")
    .data(data)
    .enter()
    .append("circle")
      .attr("cx", function(d){ return(x(d.Se