'plan_by_years'

ID  year    circle_id   ...
1   2018    1
2   2018    2
3   2019    1
4   2020    3

'members'
ID  member  circle_id
1   A       1
2   B       1
3   C       2
4   C       1
5   D       3

year    number_of_circle    total_member
2018    2                   3
2019    1                   3
2020    1                   1