Creating multiple rows of data for the same fields

I am in need of data for a financial application.

I need multiple rows of data for HistoricalBalance for 1 Account_Id over different times, we would like to generate a HistoricalBalance for every 15 minutes

Example;
Account_Id HistoricalBalance
1 1000
1010
1015
2 1000
1010
1015

Thanks for any help!