Counting the Continuous Fields

A hospital's intake form records seven fields for every patient:

1. Patient ID number — e.g. $100471$
2. Blood group — A, B, AB or O
3. Pain level — Low, Medium or High
4. Number of previous admissions — e.g. $3$
5. Body temperature in °C — e.g. $37.4$
6. Waiting-room time in minutes, recorded to one decimal place — e.g. $12.7$
7. Postal code — e.g. $560001$

Exactly how many of these seven fields hold continuous data?