Here they are:
1) Flooding in Indonesia, from Jan 20 to 27, costing $3.31 billion.
2) Flooding in Australia, from Jan 21 through 30, $2.5 billion.
3) Winter weather in Europe, from March 12 through 31, $1.8 billion.
4) Drought in Central and Eastern China, Jan 1 through March 31, costing $1.71 billion.
5) Severe winter weather in the Midwest U.S., March 18 to 20, totaling $1 billion.
As you can see, the U.S. got its first nine-figure-er in March in the form of the early-spring snowstorm that slammed much of the Midwest and parts of the East Coast.
Flooding in the Plains states in the past week seems like a good candidate for a sixth.