Hello. I am very new to the Stata and I would like to ask a very simple question. I have 30 years(from 1930 to 1960) of data and I want to know how my variables X1, X2, X3, X4, X5 influence on my Y variable in 3 different periods(1930-1940, 1940-1950, 1950-1960) by using year dummies. Also, I don't want to analyze it separately, which means that first analyzing the time period of 1930-1940 and then 1940-1950 and so on. I want to use the year dummy and I want to know how results will be different during the 3 different periods. What is the Stata command for doing it? Thanks very much... I attached the data for better understanding.

1. How my X1, X2, X3, X4, X5 variables influence on Y during the time period of 1930-1940?
2, How my X1, X2, X3, X4, X5 variables influence on Y during the time period of 1940-1950?
3, How my X1, X2, X3, X4, X5 variables influence on Y during the time period of 1950-1960?