The chart below shows the global sales of different kinds of digital games from 2000 to 2006.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
The bar chart illustrates global turnover of four categories of digital games, namely mobile phone games, online games, console games and handheld games, over the period from 2000 to 2006, measured in billions of US dollars.
Overall, worldwide sales of handheld games remained the highest across the seven years, while console games saw a steady decline in sales. By contrast, mobile phone games and online games, which had negligible sales at the start of the period, grew rapidly to become the second and third most popular game types respectively by 2006.
In 2000, handheld games dominated the market with sales of around $11 billion, far exceeding console games which made up just under $6 billion. Handheld game sales continued to rise gradually, reaching a peak of approximately $18 billion in 2006. Conversely, console game sales dropped consistently over the period, falling to a low of roughly $3 billion in the final year.
Mobile phone games and online games first appeared on the market in 2001 and 2002 respectively, with both starting at under $1 billion. Sales for both categories rose significantly: by 2006, online games generated around $8 billion in sales, slightly higher than the $7 billion from mobile phone games.