Statistics

Statistics are a system that were added to Minecraft in the 1.5 update. Notch talked about statistics (along with Achievements) on his March 18th Blog Post.

Saving of stats online was considered for the 1.6 update, but was considered too error prone at that point

The statistics window is divided into three sections: General, Blocks and Items. The General screen shows a multitude of generic statistics which are listed in the table below. The Blocks screen shows the number of times different blocks have been crafted, used(placed) and mined. The Items screen shows the number of times different items have been depleted, crafted and used to destroy blocks. The buttons at the top of the Blocks and Items screens can be used to sort the list.

Progress on Statistics can be found on in the .minecraft folder named "stats_username_unsent.dat".

Trivia

 * The statistics ignore metadata. As such, all types of wood, wool, saplings, and dye will be counted as the same item. Coal and charcoal are also treated as the same.
 * Firing an arrow from a bow does not count as using it.
 * "Times Crafted" includes smelting, such as smelting wood for charcoal.
 * On the items tab, there is no tooltip on Ink sac. This is because the Ink sac is the damage value 0 of the dye ID (read the first trivia).
 * The "Times Crafted" symbol is a hammer and anvil. In the actual game, crafting used done with a Crafting Table.