Write SQL query to solve given problem: How many papers were published in 2005. Calculate the difference between the number of paper published in 2005 and the number of paper published in the previous year.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(CASE WHEN Year = 2005 THEN 1 ELSE 0 END) , SUM(CASE WHEN year = 2005 THEN 1 ELSE 0 END) - SUM(CASE WHEN year = 2004 THEN 1 ELSE 0 END) AS diff FROM Paper