d3 plot of uranium ore production by country

<!DOCTYPE html>
<html lang = "en">
	<head>
		<meta charset = "utf-8">
		<title>Uranium ores &amp; concentrates production</title>
		<style type="text/css">
		
			h1,h2,h3,p {
			font-family: futura;
			}

h2,p {
			text-indent: 120px;
			color: steelblue;		
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				background-color: white;
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rect:hover {
				fill: pink;
			}
			
			.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: futura;
				font-size: 11px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
		<script type="text/javascript" src = "https://d3js.org/d3.v3.js"></script>
	</head>
	
	<body>
		<h2>Uranium ore &amp; concentrate production in 2010 by country </h2>
		<p>Production in metric tons = 1000 kg. Source: <a href="https://data.un.org/Data.aspx?d=ICS&f=cmID:13000-1" >United Nations Industrial Commodity Statistics Database</a> </p>
	
		<script type="text/javascript">

// Define width / height of SVG element.
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			var currSVG_h = 550; // y-axis

// Define padding
			var padding = [0, 20, 50, 120]; // Top Right Bottom Left (like in CSS)

// Create a fn that scales data along x-axis, range specifies output scale pxls.
			var widthScale = d3.scale.linear()
							   .range([ 0 , currSVG_w - padding[1] - padding[3] ]);

// Create a fn that scales data along y-axis, range specifies output scale in pxls.
			var heightScale = d3.scale.ordinal()
								.rangeRoundBands([ padding[0], currSVG_h - padding[2] ],0.2);

// Create a fn that will draw our x-axis
			var xAxis = d3.svg.axis()
							  .scale(widthScale)					
							  .orient("bottom");

var yAxis = d3.svg.axis()				
						 	.scale(heightScale)
						 	.orient("left");

// Define our working SVG area of the page
			var currSVG = d3.select("body")
							.append("svg")
							.attr("width", currSVG_w)
							.attr("height", currSVG_h);

//Load in contents of CSV file & plot
			d3.csv("uranium_data_12APR15.csv", function(data) {

//CSV converted to JSON objects.

//Log 'data' to the console, for verification.
					// console.log(data);

data.sort(function(a, b) {
				return d3.descending(+a.yr_2010, +b.yr_2010);
				});

// input x-axis scale of our data	
				widthScale.domain([ 0, d3.max(data, function(d) {
						return +d.yr_2010;
				}) ]);

// input y-axis (ordinal) scale of our data
				heightScale.domain(data.map(function(d) { return d.country; } ));

// initialize rectangles that will comprise our bar chart
				var rects = currSVG.selectAll("rect")
								   .data(data) // data gets bound
								   .enter() // data enters the stage
								   .append("rect"); //what we are drawing with
					
					rects.attr("x", padding[3]) // each bar starts at same x position
						.attr("y", function(d) { //"d" here is a single data point, while "i" is the index
						   		return heightScale(d.country);
						}) 
						.attr("width", function(d){
						   	return widthScale(d.yr_2010); 
						})
						.attr("height",heightScale.rangeBand())
						.attr("fill","gold") // fill color of the bars
						 .append("title")
						 .text(function(d) {
						 return d.country + " produced " + d.yr_2010 + " metric tons of Uranium ores and concentrates in 2010.";
						 });

// Draw the x-axis		   
				currSVG.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (currSVG_h - padding[2]) + ")")
					.call(xAxis);

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					.call(yAxis);

});

</script>

</body>
</html>