The health of Steve Jobs may be extremely critical to Apple's monetary worth, a new Barron's report claims. Compiling its annual 30 Most Respected CEOs list, the publication notes that stock value dropped when word came out of Jobs' medical problems. The executive was forced to take a six-month leave of absence during 2009. Particularly considering that Apple's market value has recently topped $200 billion, Jobs' life is estimated by Barron's to be worth