rvasp

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    .line {
      fill: none;
      stroke: MidnightBlue;
      stroke-width: 2px;
    }
    
   .line2 {
      fill: none;
      stroke: Orange;
      stroke-width: 2px;
    }
    .grid line {
    stroke: lightgrey;
    stroke-opacity: 0.6;
    shape-rendering: crispEdges
  }
  .grid path {
    stroke-width: 0;
  }
    .area {
  fill: none;
  clip-path: url(#clip);
}
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
  <link href='https://fonts.googleapis.com/css?family=Cabin:300,400' rel='stylesheet' type='text/css'>
  <script src="https://d3js.org/d3.v4.min.js"></script>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

// parse the date / time
var parseTime = d3.timeParse("%Y");

// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);

// define the line
var valueline = d3.line()
.curve(d3.curveBasis)
    .x(function(d) { return x(d.year); })
    .y(function(d) { return y(d.rvNew); });
    
var valueline2 = d3.line()
.curve(d3.curveBasis)
    .x(function(d) { return x(d.year); })
    .y(function(d) { return y(d.rvUsed); });

// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform",
          "translate(" + margin.left + "," + margin.top + ")");
    
 d3.csv("rvasp.csv", function(error, data) {
  if (error) throw error;

// format the data
  data.forEach(function(d) {
      d.year = d.year;
      d.rvNew = +d.new_asp;
    	d.rvUsed = +d.used_asp;
  });   
   
 x.domain(d3.extent(data, function(d) { return d.year; }));
  y.domain([0, d3.max(data, function(d) { return d.rvNew; })]);

// Add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line")
      .attr("d", valueline);
   
    svg.append("path")
      .data([data])
      .attr("class", "line2")
      .attr("d", valueline2);

// Add the X Axis
  svg.append("g")
      .attr("transform", "translate(0," + height + ")")

.call(d3.axisBottom(x)
           .tickFormat(d3.format("y")))

// Add the Y Axis
  svg.append("g")
      .call(d3.axisLeft(y));

});
    
  </script>
</body>

https://d3js.org/d3.v4.min.js