Dash or not to dash?

Often its hard to find a domain name, and sometimes people use dashes in their domain name. For example car-rental.com in stead of carrental.com.
To generate these statistics we detect how many live domain names have one or more dashes.
Domains using a dash
Dash usage per tld (currently)
# Tld Percentage
Dash usage per country tlds (currently)
# Tld Country Percentage