has been decelerating
Present perfect progressive he/she conjugation of decelerate.

decelerate

On the left panel of Figure 2, we can see that growth in the LAC region has been decelerating for the past six years, including negative growth in 2017.
En el panel superior de la Figura 2, podemos ver que el crecimiento en ALC se ha desacelerado en los últimos seis años, incluyendo un crecimiento negativo el año pasado.
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