A quick glance at the bar graph depicts how many volumes of films formatted in 4 different versions were hired and retailed in a shop spanning from 2002 to 2011.
Overall, the highest number of DVD was purchased in 2007 compared to same item in 2006 and 2009 while there was the lowest pattern on blue- ray sales in 2007.
In therms of bue-ray sales, people did not use this type of film until 2006, and then the number of sales of it was a tiny amount at under 5000 in first used year before reaching over 10000 in the last years. Unlikely, the VHS, second popular film in 2002 have not been used longer since 2006. The index experienced gradual drop from over 80000 in 2002 to 10.000 in 2005.
In first 2 years, consumers prefer to rent the film than sale, constituting roughly 180.000 units. The number is gradually decrease in the following years to 60.000 in 2011. In contrast, the index of DVD sales witnessed significant climb during the middle years. It was over 40,000 in 2002, and then hit a peak at over 200.000 in 2007 until a dropping to 180.000 again in 2011.