getAveragesForGrade = (grade, allCount) => {
let years = [2013, 2014, 2015, 2016, 2017];
let averages = [
[],
[],
[]
];
years.forEach((year) => {
let always = [],
added = [],
dropped = [];
Object.keys(padres_always).forEach((school) => {
always.push(studentsInGrade(padres_always, school, grade, year));
});
Object.keys(padres_added).forEach((school) => {
added.push(studentsInGrade(padres_added, school, grade, year));
});
Object.keys(padres_dropped).forEach((school) => {
dropped.push(studentsInGrade(padres_dropped, school, grade, year));
});
averages[0].push(averageOf(always, allCount));
averages[1].push(averageOf(added, allCount));
averages[2].push(averageOf(dropped, allCount));
});
return averages;
}