Not everyone's days are always Sunny, but around 7 percent of Americans experience episodes of depression each year. For them, the days might almost always be cloudy.

A medical review by Lindsey Marcellin, M.D., M.P.H. has identified 10 jobs that would most likely increase the chances of depression.

1. Caregiving

According to a 2007 National Survey on Drug Use and Health, 10.8 percent of full-time caregivers aged 18 to 64 are suffering depression. This figure is higher than that of any other field.

Full-time caregivers experience stresses and demands every day and are very easily drained emotionally. Depression is the most common emotional health problem amidst professionals who take care of sick people.

2. Food Service

Rude customers, uncaring supervisors, and low salary creates many displeasing situations for restaurant workers. More than 10 percent of full-time restaurant workers apparently experienced a major depressive episode every year.

3. Social Work

Social workers may sometimes receive a rewarding time when their cases turn into budding successes and they are able to help the community and fulfill their need of selfless sacrifice. However, to work as a social worker might avail yourself to stresses, and those without an emotional fortitude might find the problems encroaching on you, and might turn you into someone who would need help in the future.

4. Arts

Creativity will free the souls of artists, but the unpredictable and solitary lifestyle it might sometimes bring, can in fact bring a joyful soul into the depths of depression. Best-selling authors, big-name entertainers, and famous painters are not the mainstream amongst people who pursue this career path.

5. Teaching

It's not easy being a teacher. Many become teachers because they like to have people listen to what they have to say, but students don't always like to listen. With low starting pay, and the constant stresses of work, teachers might feel more difficult than the students themselves, as they tread through grading the homework that they have assigned.

6. Sales

The recent economy depression can depress any worker's emotional health. Sales in the current market must survive with a risk-averse personality and people skills. Without the right mindset, many can fall into a self-defeating paradox.

However, statistics do also show that the jobless are the most depressed among all categories, with a 13 percent chance of a depressive episode.