Given the following data,Calculate the inflation rate?

Given the following data,

Calculate the inflation rate

Inflation rate for different years are calculated as
Year 1996-97 = 127.2–121.6/121.6 x 100 = 4.6%

Year 1997-98 = 132.8–127.2/127.2 x 100= 4.40 %
Year 1998-99 =140.7 - 132.8 /132.8 x 100= 5.94%
Year 1999-2000 = 145.7-140.7/140.7 x 100= 3.55%
Year 2000-01 = 155.7 - 145.7/145.7x 100= 6.86%
Year 2001-02 =161.3 - 155.7/155.7 x 100= 3.59%

Year 2002-03 = 166.8- 161.3/161.3 x 100=3.40%

There are many ups and downs in the wholesale price index (WPI).