Former city council president John F. Street was elected mayor in 1999 and city revitalization continued into the 21st century. The Street administration targeted some of the city's worst neighborhoods for revitalization and made considerable progress. Tax breaks created in 1997 and 2000 helped create a condominium boom in Center City, increasing the population of Center City and helping slow the city's 40-year population decline. The population of Center City rose to 88,000 in 2005 from 78,000 in 2000 and the number of households grew by 24 percent.