NA = "NA"

0 = "0"

1:200 = "1-200"

201:400 = "201-400"

401:600 = "401-600"

601:800 = "601-800"

801:1000 = "801-1000"

1001:1200 = "1001-1200"

1201:1400 = "1201-1400"

1401:1600 = "1401-1600"

1601:1800 = "1601-1800"

1801:2040 = "1801-2040"