According to the Census Bureau’s 2010 American Community Survey, the majors that give you the best chance of reaching the 1 percent are pre-med, economics, biochemistry, zoology and, yes, biology, in that order.
Below is a chart showing the majors most likely to get into the 1 percent (excluding majors held by fewer than 50,000 people in 2010 census data). The third column shows the percentage of degree holders with that major who make it into the 1 percent. The fourth column shows the percent of the 1 percent (among college grads) that hold that major. In other words, more than one in 10 people with a pre-med degree make it into the 1 percent, and about 1 in 100 of the 1 percenters with degrees majored in pre-med.