| Category | March 2017, % (n) | March 2018, % (n) |
|---|---|---|
| Practices with no extended access | 11.7 (684) | 10.8 (631) |
| Practices with only internal extended access | 53.0 (3091) | 33.3 (1941) |
| Practices with only external extended access | 6.4 (375) | 12.1 (704) |
| Practices with both internal and external extended access | 28.7 (1675) | 43.8 (2553) |