Exhibit 11.1

Exhibit 11.4

Exhibit 11.2

Exhibit 11.5

Exhibit 11.3

¹¹ Twenty-eight percent of Medicare beneficiaries receive prescription drug coverage from an employer, a far higher number than receive coverage through a Medicare HMO (15%), Medigap (7%) or Medicaid (10%). Laschober et. al., Health Affairs, February 2002.