Xinhua University has a nursing home in Beidaihe. It receives faculty and staff every summer. Last summer, the occupancy rate of the nursing home, i. e. the utilization rate of all beds, was 87%. The proportion of faculty and staff who have been here to recuperate this summer has dropped to 8%, but the occupancy rate has risen to 92%. If the following items are true, they all help explain the seemingly contradictory data above, except? ['The school has newly established a science school this year, and the total number of faculty and staff has increased significantly compared with last year.', 'After the renovation last winter, the quality of the facilities in the nursing home has improved significantly, greatly increasing the attractiveness to the nursing home.', 'The total number of guest rooms in the nursing home remains unchanged this year, but the proportion of single rooms has increased from 5% to 10%; double rooms have increased from 40% to 60%.', 'Some rooms of the sanatorium last year have been changed to a pedicure health room or chess and entertainment room this year.']