Yes we do have a priority draw system here now but it sill does not mean you will get drawn in the top group. Record of how many times you have been applying didn't start till 1994 so technically in the eyes if the goverment nobody has been trying with no luck longer than 18 years. there is another tier starting soon as the this pool grows. Here are some draw stats. As you can see the top tier still only has a little under 40% chance of being drawn.
Overall Draw Stats By Priority Group
Group
0 (0-4 Years/1 Ballot) Valid Applicants 33,363 Successful Applicants 848 %Successful 2.54
1 (5-9 Years/3 Ballots) Valid Applicants 19,007 Successful Applicants 1,321 % Successful 6.95
2 (10-14 Years/9 Ballots) Valid Applicants 9,223 Successful Applicants1,634 % Successful 17.72
3 (15-19 Years/27 Ballots) Valid Applicants 2,057 Successful Applicants 816 % Successful 39.67
Total: Valid Applicants 63,650 Successful Applicants 4,619 % Successful 7.26