How many watts should I be hitting?

I'm 5'2'' and 117 lbs and today I was able to sustain around 140-150 watts for the 30 second all outs, and towards the end of them hit 170-190. I felt like i was trying REALLY hard though when I was close to 200 and don't think I could have hit any higher. Does anyone know what's a "good" wattage to be hitting, and how to increase that number? Thanks!

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