Figure 2 shows how the budgets of the UN, NATO and the WTO changed between 2005 and 2018, reflecting among other things their enlargement over the period analysed (see Table 2). Overall, the UN budget recorded the biggest increase. The budgets of all three IGOs grew until about 2009. Between 2005 and 2018, the WTO budget increased more steadily than the other two budgets. The NATO budget experienced the most dramatic fluctuations: the upward trend witnessed between 2006 and 2013 was replaced by a dramatic drop between 2013 and 2015.