Well the worst aspects of the travel ban were reversed by the courts, but the initial version that Trump tried to pass would have meant that eg Iranians with gr

Well the worst aspects of the travel ban were reversed by the courts, but the initial version that Trump tried to pass would have meant that eg Iranians with green cards who happened to be outside the US when the ban started couldn't return to the US, which obviously would have reduced (even reversed?) talented immigration. Also your link is meaningless because the most common way to get an employment green card is by adjusting status in the US (from eg H1-B status to green card), not by getting an immigrant visa, but that table only counts immigrant visas.