booster = {
let result = [
{REGION: "Flanders", VACCINATED: 153214, TOTAL: 199519},
{REGION: "Wallonia", VACCINATED: 33381, TOTAL: 87672},
{REGION: "Brussels", VACCINATED: 3457, TOTAL: 15781},
{REGION: "Ostbelgien", VACCINATED: 622, TOTAL: 1542},
];
const bel = {
REGION: "Belgium",
VACCINATED: d3.sum(result, d => d.VACCINATED),
TOTAL: d3.sum(result, d => d.TOTAL)
};
result.push(bel);
result.forEach(d => d.RATIO = d.VACCINATED / d.TOTAL);
result.forEach(d => d.LABEL = d3.format(",")(d.VACCINATED) + " of " + d3.format(",")(d.TOTAL));
return result;
}