The number of India's reported cases ranges from 1 to 4.35 thousand and shows an increase of nearly 340 percent over the period from the year 1996 to the year 1998. 
Over the period from the year 1998 to the year 2002, the number of India's reported cases ranges from 4.35 to 0.16 thousand and shows a decrease of nearly 100 percent. 
Moderate decreases are observed almost every year.