caculating industry level TFP growth rate

[Arianna MJ Kim]

Hello. I have some questions.
I have panel dataset, firm i, industry j, year t.
I have firm's TFP which is log value of firm's total factor productivity.
Firm's TFP growth rate=TFP- l.TFP

Firm i belong to industry j. Industry j's TFP growth rate is as follows.
bysort industry year: egen industrytfpmean=mean (TFP)
gen indstrytfpmeangrowth= industrytfpmean- l.industrytfpmean

Now I have a problem. I would like to caculate the industry k's TFP growth rate (k is not equal to j).
I want to caculate the other industries' TFP growth rate which firm i does not belong to.
Could you please help me?
Thank you in advance.