Any chance you can order the placemarks in the KMZ by date? Also, can you change the date to "Date Updated:" and perhaps add a "Date First Reported" ? It will make it easier to understand the data in the file.
For instance, when I see 10/20/05 it makes me thing 44 deaths have been reported just today rather than overall.
Please let me know if I can help!
Thanks in advance.