newbie question

[Jonas Geiregat]

When I use strace /bin/echo foobar
I get this output
 strace -c /bin/echo foobar   
execve("/bin/echo", ["/bin/echo"], [/* 64 vars */]) = 0

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 29.26    0.000189           7        29        13 open
 27.24    0.000176         176         1           write
 16.56    0.000107           8        14           mmap2
  7.12    0.000046          15         3           read
  5.42    0.000035           2        17           fstat64
  4.64    0.000030           2        16           close
  3.25    0.000021           4         5           old_mmap
  2.94    0.000019           6         3           munmap
  2.32    0.000015           2         7           brk
  0.62    0.000004           4         1           uname
  0.62    0.000004           4         1           mprotect
------ ----------- ----------- --------- --------- ----------------
100.00    0.000646                    97        13 total

Now I don't get much of what is outputted and there is not much info 
about this output in the man pages
I want to know how many sys call he made/used for executing this binairy
I just can't believe he made 97 for this simple programma
and what could errors syscall mean any info would help
Regards Jonas