Table 5 Estimated domestic transmission rates in Canada.

${\chi }_1^C$

5.54 year^-1

${\chi }_2^C$

3.25 year^-1

${\chi }_3^C$

0.62 year^-1

${\chi }_4^C$

0.88 year^-1

${\chi }_5^C$

1.04 year^-1

${\chi }_6^C$

0.47 year^-1

${\chi }_7^C$

0.24 year^-1