Table 1. Crude prevalence of schistosomiasis japonicum in the lake and marshland regions, China^*.

Year	N	Min (10−6)	Median (10−3)	P2.5 (10−5)	P97.5 (10−2)	Max (10−2)
1999	144	9.83	3.76	2.32	7.52	25.0
2000	147	14.8	5.25	11.4	6.03	11.0
2001	160	42.2	7.50	16.1	6.76	21.3
2007	143	4.90	4.12	3.05	4.35	8.54
2008	137	4.90	4.12	1.83	4.00	8.65

*N: number of counties reporting schistosomiasis cases;

P2.5: percentile 2.5; P97.5: percentile 97.5.