Axios shines a light on the growth of the refugee population since the 1970s. It writes: Since the 1990s, the sources of the greatest number of refugees are Syria (internal conflict and ISIS); Afghanistan (one of the largest, longest-lasting refugee crises); South Sudan (millions of South Sudanese fled elsewhere as a civil war rages); Myanmar (the Rohingya minority); and Somalia (natural disasters and 25 years of conflict).
The article does not mention persons who have fled El Salvador, Honduras and Guatemala.
Axois’ data from UNCHR – the UN’s refugee agency.