// 5.1 Data Join
 	svg.selectAll("rect")
 		.data(data)
 	  .enter()
 	  	.append("rect")
       		.attr("class", "g-jobs-change-bar")
       		// 6 Position elements
    		.attr("x", function(d) { return xScale(d.month_year) + xScale.rangeBand()/2; })
		    .attr("y", function(d) { return yScale(Math.max(d.jobs_change, 0)); })
      		.attr("width", xScale.rangeBand())
		    .attr("height", function(d) { return Math.abs(yScale(d.jobs_change) - yScale(0)); })
 	 ;