VegaLite({
width: 500,
height: 500,
data: {values: commoditiesRaw},
mark: "line",
encoding: {
x: {field: "date", type: "temporal", timeUnit:"yearquartermonth"},
y: {field: "value",type: "quantitative", scale: {type: "sqrt"}},
color: {field: "name", type: "nominal"}
}
})