for reference: stacked area chart d3 v4

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 12px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: none;
  shape-rendering: crispEdges;
}

.browser text {
  text-anchor: end;
}

</style>
<body>
   
<script src="https://d3js.org/d3.v4.0.0-rc.2.min.js"></script>

<div id="chart">
<p>
For reference: d3 v4 stacked area chart
</p>
</div>

</body>

var margin = {top: 20, right: 60, bottom: 30, left: 30},
    width = 500 - margin.left - margin.right, 
    height = 500 - margin.top - margin.bottom;

var parseDate = d3.timeParse('%Y');

var formatSi = d3.format(".3s");

var formatNumber = d3.format(".1f"),
    formatBillion = function(x) { return formatNumber(x / 1e9); };

var x = d3.scaleTime()
    .range([0, width]);

var y = d3.scaleLinear()
    .range([height, 0]);

var color = d3.scaleOrdinal(d3.schemeCategory20);

var xAxis = d3.axisBottom()
    .scale(x);

var yAxis = d3.axisLeft()
    .scale(y)
    .tickFormat(formatBillion);

var area = d3.area()
    .x(function(d) { 
      return x(d.data.date); })
    .y0(function(d) { return y(d[0]); })
    .y1(function(d) { return y(d[1]); });

var stack = d3.stack()

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('data.csv', function(error, data) {
  color.domain(d3.keys(data[0]).filter(function(key) { return key !== 'date'; }));
  var keys = data.columns.filter(function(key) { return key !== 'date'; })
  data.forEach(function(d) {
    d.date = parseDate(d.date); 
  });
  tsvData = (function(){ return data; })();

stack.keys(keys);

stack.order(d3.stackOrderNone);
  stack.offset(d3.stackOffsetNone);

console.log(stack(data));

var browser = svg.selectAll('.browser')
      .data(stack(data))
    .enter().append('g')
      .attr('class', function(d){ return 'browser ' + d.key; })
      .attr('fill-opacity', 0.5);

browser.append('path')
      .attr('class', 'area')
      .attr('d', area)
      .style('fill', function(d) { return color(d.key); });
      
  browser.append('text')
      .datum(function(d) { return d; })
      .attr('transform', function(d) { return 'translate(' + x(data[13].date) + ',' + y(d[13][1]) + ')'; })
      .attr('x', -6) 
      .attr('dy', '.35em')
      .style("text-anchor", "start")
      .text(function(d) { return d.key; })
      .attr('fill-opacity', 1);

svg.append('g')
      .attr('class', 'x axis')
      .attr('transform', 'translate(0,' + height + ')')
      .call(xAxis);

svg.append('g')
      .attr('class', 'y axis')
      .call(yAxis);

svg.append ("text")
    .attr("x", 0-margin.left)
    .text("Billions of liters")

});

</script>

https://d3js.org/d3.v4.0.0-rc.2.min.js