splitByArea = ({
nord: getBins(data.filter(d => d.ITTER107.startsWith('ITF') || d.ITTER107.startsWith('ITD'))),
centro: getBins(data.filter(d => d.ITTER107.startsWith('ITE'))),
sud: getBins(data.filter(d => d.ITTER107.startsWith('ITF'))),
sudEIsole: getBins(data.filter(d => d.ITTER107.startsWith('ITG'))),
})