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| L4+ | 1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
2003 |
2004 |
2005 | 2006 | 2007 | 2008 |
| English | 38% |
53% |
59% |
70% |
69% |
51% |
43% |
62% |
65% | 76% | 69% | 82% |
| Maths | 35% |
44% |
72% |
55% |
67% |
59% |
62% |
58% |
61% | 77% | 69% | 73% |
| Science | 47% |
67% |
79% |
74% |
76% |
70% |
80% |
77% |
78% |
90% |
82% | 90% |
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