How can I do different regression model in rstudio, it is a cross sectional model and I want to get different betas at different periods

My goal is to recreate the following table

Screen Shot 2020-11-13 at 2.43.57 PM

I have data from 12 countries; Australia, USA, UK......and I have from 1870 to 2016, I manage to create 5 years periods,

so I have
Australia 1870-1874
Australia 1875-1879....
US on

we have the following model-

and what I want is the following thing

Period 1 beta1,1
period 2 beta 1,2
..... so on!
I will be very grateful if you could help me,

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