What percentage of nations have achieved independence since 1993 and practice parliamentary democracy? Please include any three parliament-based democracies that attained independence after 1993.
Percentage of rivers with lengths greater than 3,000 miles = [(Total number of rivers with lengths greater than 3,000 miles) / (Total number of rivers)] * 100%
SELECT SUM(IIF(government = 'parliamentary democracy', 1, 0)) , CAST(SUM(IIF(government = 'parliamentary democracy', 1, 0)) AS REAL) * 100 / COUNT(*) FROM politics AS t1 WHERE STRFTIME('%Y', independence) >= '1993'