Table 2. Annual numbers of cases per sentinel medical institution in infectious disease surveillance in Japan, April 1999-March 2002, compared with range of those in 1993-1997.

Annual numbers of cases per sentinel medical institution
Diseases	April 1999-March 2000	April 2000-March 2001	April 2001-March 2002	Range(1993-1997)
				minimum	maximum
Influenza-like illness	193.13	57.01	144.50	44.75	312.12
Pharyngoconjunctival fever	4.12	7.85	7.76	1.76	4.39
Group A streptococcal pharyngitis	43.81	57.60	50.82	24.71	34.88
Infectious gastroenteritis	294.63	299.58	287.90	192.51	498.41
Chickenpox	84.02	97.85	83.54	73.40	77.98
Hand-foot-mouth disease	18.68	70.25	41.10	10.07	65.35
Erythema infectiosum	8.64	14.31	23.09	5.29	22.74
Exanthema subtium	42.79	42.67	40.70	34.22	36.75
Pertussis	1.16	1.18	0.56	1.14	2.34
Rubella	1.24	1.05	0.89	6.70	61.20
Herpangina	53.80	49.12	47.06	29.98	39.60
Measles	3.40	9.42	9.28	6.50	14.30
Mumps	30.89	58.13	83.66	29.21	62.37

Data of fiscal years are used in 3 years from 1999 through 2001.