Temp gauge stays a little higher
 

Hi everyone.
I have a year 2004 camry with 2.4 engine. Temp gauge of my engine coolant stays a little higher than normal. (one step above horizontal). It gets there very quickly and stays there. Does not go up or down however I drive it, regardless of weather. I bought the car second hand and dont know when this problem started. I have been driving the car in this condition for 3000 km. No problems so far.
Can anybody help with this situation, is this a sensor problem or gauge or coolant maybe...
Thanks..

Are you needing to add coolant frequently to the reservoir?