“…The drought frequency in the moderate, severe, and extreme categories is shown in Figure 4. For 35 years, the highest frequency of moderate drought (Figure 4a) occurred at the 1987, 1991, 1994, 1997, 2002, 2003, 2006, 2008, 2011, 2012, 2015, 2019Negative IOD 1989, 1992, 1996, 1998, 2010, 2013El Ni ño 1986/87, 1987/88, 1991/92, 1994/95, 1997/98, 2002/03, 2004/05, 2006/07, 2009/10, 2014/15, 2015/16, 2018/19 La Ni ña 1988/89, 1995/95, 1998/99, 1999/00, 2000/01, 2005/06, 2007/08, 2008/09, 2010/11, 2011, 2017/18…”