(Getty Images) By Sarah Klein Amid the highest unemployment rate in recent decades and massive job losses around the country, most workers feel happy to at least be employed. What they aren’t feeling, however, is healthy. One in three workers has at least one symptom of clinical depression; 41% say they feel stressed sometimes, often, or very often; and one in five has trouble falling asleep often or very often. In all, 14% are being treated for high cholesterol and one in five is taking