The number of members in a school's Robotics Club over six academic years was: 25 in Year 1, 30 in Year 2, 32 in Year 3, 36 in Year 4, 38 in Year 5, and 42 in Year 6. Between which two consecutive years was there the largest percentage increase in club membership?
Year 1 and Year 2
Year 2 and Year 3
Year 3 and Year 4
Year 4 and Year 5
Year 5 and Year 6
