I disagree with you

请你接着看下面这一段

“U.S. law limits the number of immigrant visa numbers that are available every year. This means that even if the USCIS approves an immigrant visa petition for you, you may not get an immigrant visa number immediately. In some cases, several years could pass between the time USCIS approves your immigrant visa petition and the State Department gives you an immigrant visa number. In addition, U.S. law also limits the number of immigrant visas available by country. This means you may have to wait longer if you come from a country with a high demand for U.S. immigrant visas.”