Forms of tenses Reported speech
If you use a reporting verb in present tense you don't have to change the tenses.
The article says the majority of Pakistanis came in the 1950s.
If you use a reporting verb in past tense, there is a timeshift!
direct: I am Pakistani.
indirect: He told me that he was Pakistani.
direct: Have you realized that?
indirect: He asked me if I had realized that.
In reported speech you need to change pronouns and certain expressions for place & time, for example from I to he or she, or from yesterday to the previous day and so on.
direct: I went to a club yesterday!
indirect: He said he had been to a club the previous day.