Understanding accelerometer MPU6050 reading

I have done a calibration for accelerometer at 10m/s2 and 160Hz, but i do not understand how to read those data. Why is the vibration is between -30000 and 30000 for acceleration in z? Also I will include my code and the results in attachments.

MPU6050_raw_uncalibrated.ino.ino (4.05 KB)