How often is the server overloaded?

A web server is either healthy or overloaded each minute, and the next minute depends only on the current one:

• If healthy now, it becomes overloaded next minute with probability $0.1$ (and stays healthy with probability $0.9$).
• If overloaded now, it becomes healthy next minute with probability $0.4$ (and stays overloaded with probability $0.6$).

In the long run, what fraction of minutes is the server overloaded?