has seesawed
Present perfecthe/sheconjugation ofseesaw.

seesaw

The number of women students at the National Institute of Physical Education and Sports has seesawed, falling from 8 in 1994-1995 to 5, then rising to 12 and falling once more to 11 in 1997-1998.
El número de muchachas inscritas en el Instituto Nacional de Educación Física y Deportiva ha evolucionado en dientes de sierra: de 8 alumnas en 1994-1995, disminuyó a 5 y luego pasó a 12 y a 11 en 1997-1998.
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