Regional breakdowns by month (CartoDB + D3)

<!DOCTYPE html>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://libs.cartocdn.com/cartodb.js/v2/cartodb.js"></script>
<style>

body {
  font: 10px sans-serif;
}

svg {
  padding: 10px 0 0 10px;
}

.arc {
}

</style>
<body>
<script>

var radius = 48,
    padding = 10;

var first_layer = 'unemploy_annual';

var sql = new cartodb.SQL({ user: 'wdbassetmap', format: 'json', dp: 5});

// var color = d3.scale.ordinal()
//     .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

var color = d3.scale.linear()
    .domain([0, 0.03, 0.05, 0.07, 0.10, 0.14, 0.25])
    .range(["916D80","B64880","#C83680", "#DA2480", "#EC1280", "#FF0080", "red"])
    .interpolate(d3.interpolateLab);

var arc = d3.svg.arc()
    .outerRadius(radius)
    .innerRadius(radius - 24);

var pie = d3.layout.pie()
    .sort(null)
    .value(function(d) { 
      //return d.val; 
      return 40
    });

sql.execute("SELECT name, jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec FROM {{table_name}}", {table_name: first_layer})
  .done(function(collection) {
  var data = collection.rows;

// color.domain(d3.keys(data[0]).filter(function(key) { 
  //   return key !== "name"; }));

var months = [];
  d3.keys(data[0]).forEach(function(v){
    if (v !== "name") {
        months.push(v);
    }
  });

data.forEach(function(d) {
    d.ages = d3.values(months).map(function(name) {
      //console.log(d, name)
      return {name: name, val: +d[name]};
    });
  });

var legend = d3.select("body").append("svg")
      .attr("class", "legend")
      .attr("width", radius * 2)
      .attr("height", radius * 2)
    .selectAll("g")
      .data(color.domain().slice().reverse())
    .enter().append("g")
      .attr("transform", function(d, i) { return "translate(0," + i * 14 + ")"; });

legend.append("rect")
      .attr("width", 12)
      .attr("height", 12)
      .style("fill", color);

legend.append("text")
      .attr("x", 18)
      .attr("y", 6)
      .attr("dy", ".35em")
      .text(function(d) { return d; });

var svg = d3.select("body").selectAll(".pie")
      .data(data)
    .enter().append("svg")
      .attr("class", "pie")
      .attr("width", radius * 2)
      .attr("height", radius * 2)
    .append("g")
      .attr("transform", "translate(" + radius + "," + radius + ")");

svg.selectAll(".arc")
      .data(function(d) { return pie(d.ages); })
    .enter().append("path")
      .attr("class", "arc")
      .attr("d", arc)
      .style("stroke", "#fff")
      .style("fill", function(d) { 
        return color(d.data.val); })
      .on("mouseover", function() {
        d3.select(this)
          .style('stroke', d3.select(this).style("fill"));
      })
      .on("mouseout", function() {
        d3.select(this)
          .style('stroke', "#fff")
      })
      .append("svg:title")
        .text(function(d) { 
          var label = d.data.name + ": " + d.data.val; 
          return label.charAt(0).toUpperCase() + label.slice(1);
        })

svg.append("text")
      .attr("dy", ".284em")
      .style("text-anchor", "middle")
      .text(function(d) { return d.name; });

});

</script>

Modified http://d3js.org/d3.v3.min.js to a secure url

Modified http://libs.cartocdn.com/cartodb.js/v2/cartodb.js to a secure url

https://d3js.org/d3.v3.min.js

https://libs.cartocdn.com/cartodb.js/v2/cartodb.js