"The two-network average showed an increase of 111%, or 4.0 compared with 1.9."

Thanks to reader Hugh for emailing this Thomas Bonk piece picked up in The Age, but run originally in today's L.A. Times. These numbers may cause dangerous health effects in tournament directors who never see Tiger Woods: 

According to research that traced Woods' effect on television ratings in 2007, tournaments in which he finished in the top five had a 171% increase in CBS' ratings over those in which he did not play or wasn't in contention.

The ratings were 4.6 compared with 1.7.

In similar tournaments on NBC, the ratings increase was 59%, or 3.5 compared with 2.2.

The two-network average showed an increase of 111%, or 4.0 compared with 1.9.