When was the last time you downloaded a ringtone? 2008? For many of us, downloading our favorite pop song du jour feels as dated as choosing a buddy icon our AIM profile. However, somewhere, people still download ringtones. The mobile call alerts still make up one-third of the online music industry.

This Music Production School infographic takes a look at the still-kicking ringtone ecosystem. Not surprisingly, the ringtone industry has been in decline since 2006, when it totaled about $4.5 billion in global sales. Some predict it will be extinct by 2016.

As of November 2011, Lil Wayne dominates the ringtone charts, having the number one tune, "6 foot 7," and being featured in the number two and five tracks (Chris Brown's "Look at Me Now" and Kelly Rowland's "Motivation"). The rapper's five-time (ringtone) platinum hit "Lollypop" is the most popular tune of all time.

Overall, rap is the most dominant ringtone music genre, although when it comes to free downloads, iPhone users have more diverse tastes than their Android counterparts.

Though not a download, Nokia's classic ringtone is the world's most popular call alert, heard two billion times around the world each day.

What was your best ringtone you ever had? No judgement if you say Crazy Frog's "Beverly Hills Cop."