top users for each year group are:
Year 1: Esmai D, Zyra D, Oliver G
Year 2: Lily L, Jack D, Alexander P
Year 3: Arnold A, Annabell G, Katie O
Year 4: Qais S, Wayne O, Alec-Maximus D
Year 5: Alfie I, Megan YTL, Jacob K
Year 6: Ruby H, Amal Y, Inayah S