Original: The most notable cyclones the year were Hurricanes Ignacio and Marty, which killed 2 and 12 people in Mexico, respectively, and were collectively responsible for about $1 billion (2003 USD) in damage.
Simplified: The biggest cyclones in 2003 were Hurricanes Ignacio (which killed 2 people in Mexico) and Marty (which killed 12 people in Mexico). Those hurricanes were responsible for nearly $1 billion (2003 USD) in damage.