|Code|District|Headquarters|Population (As of 2011)|Area (km²)|Density (/km²)|
|---|---|---|---|---|---|
|AL|Almora|Almora|621,972|3,083|202|
|BA|Bageshwar|Bageshwar|259,840|2,302|113|
|CL|Chamoli|Chamoli Gopeshwar|391,114|7,613|51|
|CP|Champawat|Champawat|259,315|1,781|146|
|DD|Dehradun|Dehradun|1,695,860|3,088|550|
|HA|Haridwar|Haridwar|1,927,029|2,360|817|
|NA|Nainital|Nainital|955,128|3,860|247|
|PG|Pauri Garhwal|Pauri|686,572|5,399|127|
|PI|Pithoragarh|Pithoragarh|485,993|7,100|68|
|RP|Rudra Prayag|Rudraprayag|236,857|1,890|125|
|TG|Tehri Garhwal|New Tehri|616,409|4,080|151|
|US|Udham Singh Nagar|Rudrapur|1,648,367|2,908|567|
|UT|Uttarkashi|Uttarkashi|329,686|8,016|41|

Question: how many total districts are there in this area?
Answer: 13