| 
          Figure 1. Number of Renter-Occupied Units:1973-2001
  
            | Year | Number of Renter Occupied Units (000) |   
            | 1973 1974
 1975
 1976
 1977
 1978
 1979
 1980
 1981
 1983
 1985
 1987
 1989
 1991
 1993
 1995
 1997
 1999
 2001
 | 24,348 24,362
 24,959
 25,420
 25,815
 26,247
 26,550
 26,874
 28,123
 29,214
 32,280
 32,724
 33,747
 33,351
 33,472
 34,150
 34,000
 34,007
 33,996
 |    
 
          Figure 2. Distribution of Rental Units by Structure
Type: 1973–2001  
            | Year | Vacancy Rate |   
            | 1973 1974
 1975
 1976
 1977
 1978
 1979
 1980
 1981
 1983
 1985
 1987
 1989
 1991
 1993
 1995
 1997
 1999
 2001
 | 5.8 6.0
 5.4
 5.5
 5.4
 5.4
 5.5
 5.1
 5.3
 5.9
 7.2
 8.0
 7.2
 7.4
 7.3
 7.2
 7.8
 7.3
 7.8
 |    
 
          Figure 3. Median Age of Rental Housing Units: 1973–2001  
            | AHS Survey Year | Median Age |   
            | 1973 1974
 1975
 1976
 1977
 1978
 1979
 1980
 1981
 1983
 1985
 1987
 1989
 1991
 1993
 1995
 1997
 1999
 2001
 | 29 29
 28
 29
 28
 28
 28
 28
 28
 29
 23
 25
 26
 28
 29
 30
 32
 33
 34
 |    
 
          Figure 4. Households With Rent Burden of More Than 35 Percent 
          of Income: 1973–2001  
            | Year | % Renter Households with Burdens Over 35 Percent |   
            | 1973 1974
 1975
 1976
 1977
 1978
 1979
 1980
 1981
 1983
 1985
 1987
 1989
 1991
 1993
 1995
 1997
 1999
 2001
 | 22.5 23.7
 26.3
 27.0
 28.6
 29.0
 30.0
 31.6
 32.4
 35.0
 32.0
 35.8
 30.8
 33.1
 35.2
 35.6
 34.9
 33.4
 34.8
 |    
 
          Figure 5. Degree of Crowding in Renter Households: 1973–2001  
            | Year | More than 1.5 Persons per Room, % of Renter Households |   
            | 1973 1974
 1975
 1976
 1977
 1978
 1979
 1980
 1981
 1983
 1985
 1987
 1989
 1991
 1993
 1995
 1997
 1999
 2001
 | 2.10 1.87
 1.62
 1.61
 1.59
 1.79
 1.59
 1.67
 1.86
 1.63
 0.98
 1.37
 1.21
 1.25
 1.04
 1.16
 1.49
 0.94
 1.09
 |      
 |