Plot.plot({
y: {
grid: true,
label: "↑ Unemployment (%)"
},
marks: [
Plot.ruleY([0]),
Plot.line(bls, {x: "date", y: "unemployment", z: "division", stroke: "lightgray", title: "division"}),
Plot.line(bls, Plot.groupX({y: "mean"}, {x: "date", y: "unemployment", stroke: "steelblue"}))
],
width
})