Table 4. Weighted average of rainfall (in mm) data for the whole country for the month of January.

Year	Rainfall (in mm)	Year	Rainfall (in mm)	Year	Rainfall (in mm)
1981	29.3	1992	16.0	2003	7.6
1982	23.8	1993	18.2	2004	25.7
1983	18.5	1994	25.0	2005	28.1
1984	19.0	1995	31.3	2006	17.7
1985	23.2	1996	22.9	2007	1.7
1986	15.5	1997	14.3	2008	18.4
1987	13.2	1998	16.4	2009	12
1988	10.4	1999	13.7	2010	7.5
1989	15.4	2000	18.4	2011	6.8
1990	16.0	2001	7.3
1991	14.3	2002	15.7