How long I will wait if my US citizen brother applied my immigration in August 2008?

There remains a very long backlog for visas in the Family-based Fourth Preference visa category (siblings of U.S. citizens). Although the dates shown in the Visa Bulletin issued by the U.S. Department of State may appear to show a somewhat shorter time, because less than a year's backlog usually is met in each 12-month period, the wait for a visa is likely to be 15 - 20 years or even longer. For this reason seeking to immigration through the FB4 visa category rarely is a satisfactory strategy, and it can be worthwhile to explore other possible eligibilities.