2011 WWE PPV buyrate figures courtesy of The Wrestling Observer Newsletter.

Royal Rumble:
2011: 476,000 buys worldwide with 281,000 domestic.
2010: 465,000 buys worldwide – 259,000 domestic.

Elimination Chamber:
2011: 212,000 buys worldwide with 145,000 domestic.
2010: 287,000 buys worldwide – 160,00 domestic.

Wrestlemania:
2011: 1,124,000 buys worldwide with 665,000 domestic.
2010: 885,000 buys worldwide – 495,000 domestic.

Extreme Rules:
2011: 216,000 buys worldwide with 108,000 domestic.
2010: 201,000 buys worldwide – 112,000 domestic.

Over The Limit:
2011: 145,000 buys worldwide with 72,000 domestic.
2010: 218,000 buys worldwide – 121,000 domestic.

Capital Punishment:
2011: 176,000 buys worldwide with 85,000 domestic.
2010: 158,000 buys worldwide – 88,000 domestic.

Money in the Bank:
2011: 195,000 buys worldwide with 139,000 domestic.
2010: 164,000 buys worldwide – 98,000 domestic.

Summerslam:
2011: 296,000 buys worldwide with 171,000 domestic.
2010: 349,000 buys worldwide – 209,000 domestic.

Night of Champions:
2011: 161,000 buys worldwide with 104,000 domestic.
2010: 165,000 buys worldwide – 99,00 domestic.