I have lines like these, and I want to know how many lines I actually have...

09:16:39 AM  all    2.00    0.00    4.00    0.00    0.00    0.00    0.00    0.00   94.00
09:16:40 AM  all    5.00    0.00    0.00    4.00    0.00    0.00    0.00    0.00   91.00
09:16:41 AM  all    0.00    0.00    4.00    0.00    0.00    0.00    0.00    0.00   96.00
09:16:42 AM  all    3.00    0.00    1.00    0.00    0.00    0.00    0.00    0.00   96.00
09:16:43 AM  all    0.00    0.00    1.00    0.00    1.00    0.00    0.00    0.00   98.00
09:16:44 AM  all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
09:16:45 AM  all    2.00    0.00    6.00    0.00    0.00    0.00    0.00    0.00   92.00

Is there a way to count them all using linux commands?