def count_isp():
    isp = {}
    with open('data.csv', 'r+') as csvfile:
        reader = csv.reader(csvfile, delimiter=",")
        next(reader, None)
        for row in reader:
            if (row[4] in isp):
                isp[row[4]]+=1
            else:
                isp[row[4]] = 1
    return sorted(isp.items(), key=operator.itemgetter(1), reverse=True)