TOKYO (Reuters) - Japan's jobless rate and the availability of jobs held steady in December, government data showed on Friday. The seasonally adjusted unemployment rate was 2.2% in December, unchanged from the previous month, figures from the Ministry of Internal Affairs and Communications showed. That compared with a median market forecast of 2.3%.The jobs-to-applicants ratio stood at 1.57 in December, slightly better than economists' median forecast for 1.56, labour ministry data showed.For a..