Here are some interesting numbers from CipherTrust:

Sources of Spam 
United States 37.76%
Republic of Korea 18.07%
China 8.4%
France 3.52%
Canada 3.26%

Phishing Attacks  
CitiBank 54.16%
Smith Barney 13.48%
SunTrust 10.02%
Paypal 7.57%
Wells Fargo 5.42%

ZombieMeter - This month's Top 10
Country  Percentage  Total 
United States 19.08% 964020
China 14.56% 735598
South Korea 9.61% 485492
Germany 5.99% 302618
France 5.69% 287368
Brazil 5.56% 281168
Japan 3.70% 186691
United Kingdom 3.13% 158009
Spain 2.96% 149634

For updated numbers and other stats:
http://www.ciphertrust.com/resources/statistics/

Don