function createPie(data, year) {
  var charts = L.featureGroup();
  let features = data.features.filter(f => {
    return f.properties.YR == year;
  });

  let newData = {};
  features.forEach(f => {
    let latlng = f.geometry.coordinates;

    for (property in f.properties) {
      const mapKey = fisheriesMap.get(property);
      if (mapKey) {
        newData[mapKey] = f.properties[property];
      }
    }

    var pieData = {values: Object.values(newData), labels: Object.keys(newData)};
    let chart = new PieChartMarker([latlng[1], latlng[0]], pieData, {
          icon: L.divIcon({className: 'leaflet-pie-chart-marker'}),
          width: 60,
          height: 60,
          colors: ['#ff0000', '#00ff00', '#0000ff', '#ff00ff']
      });
    charts.addLayer(chart);
  });

  return charts;
}