| | 2015 | 2014 | 2013 | 2012 |
Response rate (based on NAV) | | | | |
Listed | 62% | 55% | 76% | 82% |
Non-listed | 66% | 70% | 59% | 46% |
Total portfolio | 65% | 67% | 61% | 50% |
| | | | | |
Outperforming benchmark listed | 83% | 78% | 75% | 79% |
Outperforming benchmark unlisted | 66% | 49% | 38% | 56% |
| | | | | |
Number of Green Stars listed | 21 | 18 | 9 | 8 |
Number of Green Stars unlisted | 18 | 15 | 11 | 7 |
| | | | | |
Listed improved performance (compared to last year) | 78% | 54% | 31% | n/a |
Unlisted improved performance (compared to last year) | 91% | 43% | 48% | n/a |