The bar chart gives information about the yearly quantity of rentals and sales in various formats of films from 2002 to 2011.
It is noticeable the number of rentals and VHS sales experienced a download trend, while DVD sales and Blu-ray sales showed an upward trend throughout the period, DVD sales had some fluctuation and the lowest number contribution was made by Blu-ray sales.
The number of DVD-sales was about 50, 000 in 2002, it approximately increased from 100, 000 in 2003 to well over 150, 000 by the end of 2004 and a steady growth during the next three years. On the other hand, in 2002 the number of Blu-ray sales was 0, and remained steady for the next five years, and continued to slightly escalate to the end of the period, reaching around 10, 000 in 2011. However, DVD sales was less than 180, 000 at the final year.
For number of rentals was the highest of various format in 2002, begin higher than the number of VHD sales by approximately 100, 000. In contrast, the figure showed a gradual decrease to about 180, 000 in 2003. On the one hand, the number of VHD sales decreased significantly in 2003 and 2005, and experienced 0 from 2006 to 2011. Finally, number of rentals just over 50, 000 in 2011. 
The bar chart gives information about the yearly quantity of  
rentals
 and  
sales
 in various formats of films from 2002 to 2011.
It is noticeable the  
number
 of  
rentals
 and VHS  
sales
 experienced a download trend, while DVD  
sales
 and Blu-ray  
sales
  showed
 an upward trend throughout the period, DVD  
sales
 had  
some
 fluctuation and the lowest  
number
 contribution  
was made
 by Blu-ray sales.
The  
number
 of DVD-sales was about 50, 000 in 2002, it approximately increased from 100, 000 in 2003 to well over 150, 000 by the  
end
 of 2004 and a steady growth during the  
next
 three years.  
On the other hand
, in 2002 the  
number
 of Blu-ray  
sales
 was 0, and remained steady for the  
next
 five years, and continued to  
slightly
 escalate to the  
end
 of the period, reaching around 10, 000 in 2011.  
However
, DVD  
sales
 was less than 180, 000 at the final year.
For  
number
 of  
rentals
 was the highest of various format in 2002,  
begin
 higher than the  
number
 of VHD  
sales
 by approximately 100, 000.  
In contrast
, the figure  
showed
 a gradual decrease to about 180, 000 in 2003. On the one hand, the  
number
 of VHD  
sales
 decreased  
significantly
 in 2003 and 2005, and experienced 0 from 2006 to 2011.  
Finally
,  
number
 of  
rentals
  just
 over 50, 000 in 2011.