For SIO, which year was the percent increase or decrease in production from the previous year the highest ?

Percent increase in the year 1997-98 = $$\frac{87}{85} -1 = 2.36 \%$$
Percent increase in the year 1998-99 = $$\frac{89}{87} -1 = 2.30 \%$$
Percent increase in the year 1999-00 = $$\frac{91}{89} -1 = 2.25 \%$$
Percent increase in the year 2000-01 = $$\frac{92}{91} -1 = 1.10 \%$$
Percent increase in the year 2001-02 = $$\frac{96}{92} -1 = 4.35 \%$$

Hence, the percent increase in production is highest in the year 2002 as compared to the previous year.