Data Interpretation - Bar Charts

Required percentage =		(45 - 60)		% = -25%.
		60

There is a decline of 25% in production from 1997 to 1998.

Average production (in 10000 tonnes) of 1996 and 1997	40 + 60	= 50.
	2

We shall find the average production (in 10000 tonnes) for each of the given alternative pairs:

2000 and 2001 =	50 + 75	= 62.5.
	2

1999 and 2000 =	65 + 50	= 57.5.
	2

1998 and 2000 =	45 + 50	= 47.5.
	2

1995 and 1999 =	25 + 65	= 45.
	2

1995 and 2001 =	25 + 75	= 50.
	2

The average production of 1996 and 1997 is equal to the average production of 1995 and 2001.

Required percentage =		(80 - 25)	x 100		% = 220%.
		25

The percentage increase in production compared to previous year for different years are:

In 1996 =		(40 - 25)	x 100		% = 60%.
		25

In 1997 =		(60 - 40)	x 100		% = 50%.
		40

In 1998 there is a decrease in production.

In 1999 =		(65 - 45)	x 100		% = 44.44%.
		45

In 2000 there is a decrease in production.

In 2001 =		(75 - 50)	x 100		% = 50%.
		50

In 2002 =		(80 - 75)	x 100		% = 6.67%.
		75

Clearlyl, there is maximum percentage increase in production in 1996.

Average production (in 10000 tonnes) over the given years

=	1	(25 + 40 + 60 + 45 + 65 + 50 + 75 + 80) = 55.
	8

The productions during the years 1997, 1999, 2001 and 2002 are more than the average production.