_id	tahun	rasio_siswa/kelas_sd/mi
1	2015	23.620000000000000994759830064140260219573974609375
2	2016	23.7684772929652723405524739064276218414306640625
3	2017	23.993245227606461611458144034259021282196044921875
4	2018	23.993245227606461611458144034259021282196044921875
5	2019	23