expected to double to 40% of residents by 2055
...that with a rapidly declining birth rate, Japan's elderly, with the world's highest proportion at 20% of the population, is expected to double to 40% of residents by 2055?
...that with a rapidly declining <a href="./Birth_rate" id="mwEKI" rel="mw:WikiLink" title="Birth rate">birth rate</a>, <a href="./Japan" id="mwEKM" rel="mw:WikiLink" title="Japan">Japan</a>'s elderly, with the world's highest proportion at 20% of the population, is <b id="mwEKQ"><a href="./Aging_of_Japan" id="mwEKU" rel="mw:WikiLink" title="Aging of Japan">expected to double to 40% of residents by 2055</a></b>?