Table 3.

Seroprevalence in relation to years.

Years	Ig G prevalence (%)	IgM prevalence (%)	IgG+IgM prevalence (%)
1996	18.18	27.27	9.09
1997	15.55	35.55	15.55
1998	2.56	23.07	2.56
1999	20	13.33	6.66
2000	9.67	6.45	6.45
2001	15	10	10
2002	16.66	16.66	16.66
2003	13.79	3.44	3.44
2004	26.47	14.7	14.7
2005	10	6.66	3.33
2006	10.71	0	0
2007	7.14	0	0
2008	5.26	1.74	1.74
2009	0	0	0
2010	9.3	2.32	2.32
2011	6.89	3.44	1.74
2012	7.89	0	0
2013	4.54	0	0