The chart below shows the annual number of rentals and sales (in various formats) of films from a particular store between 2002 and 2011

The bar chart clearly communicates the

number

of rentals and purchases of different film formats from a single store yearly from 2002 to 2011. In general,

it is clear that

while

the

sales

of DVD and Blu-ray witnessed upward developments, rentals and VHS

sales

were negatively correlated with downward trends. What stands out from the chart is that DVD purchases had the highest

number

over most of the given period. In detail, rental

sales

stood at approximately 185,000

sales

in 2002, which was the highest

figure

among the four forms.

This

figure

plummeted and reached a low of under 60,000

sales

in 2011.

Besides

that, the revenue of VHS went through a period of dramatic decrease from 80,000

sales

in 2002 to 10,000

sales

, which was the lowest

number

of

sales

in 2005.

By contrast

, the

figure

for DVD and Blu-ray experienced opposite movements. In 2002, the sale of DVDs was the lowest

number

with almost 50,000

sales

.

This

figure

then

experienced a dramatic increase and reached a peak of over 210,000

sales

in 2007, before hitting a slight fall to 180,000

sales

in 2011.

Likewise

, blu-ray saw a consistent climb from around 0 in 2007 to approximately 12,000

sales

in 2011