<commit_before>---
layout: data
title: Occupied and vacant housing units
"chart-title": Occupied and vacant housing units by decade
category: "housing-stock-and-occupancy"
data: "decennial-census/housing_units_occ_status.csv"
column: Year
"axis-type": category
type: bar
published: true
source: "Minnesota Population Center. National Historical Geographic Information System: Version 2.0. Minneapolis, MN: University of Minnesota 2011."
scale: "5"
colors: YlGn
"y-format": ","
notes: ""
---

Nearly half of San Francisco's housing units were built before 1940 (48.6% +/- .5%). A majority of units were constructed before 1980 (83.5% +/- .8%)<commit_msg>Updated 2014-07-02-occupancy-status.md<commit_after>---
layout: data
title: Housing units by occupancy
"chart-title": Occupied and vacant housing units by decade
category: "housing-stock-and-occupancy"
data: "decennial-census/housing_units_occ_status.csv"
column: Year
"axis-type": category
type: donut
published: true
source: "Minnesota Population Center. National Historical Geographic Information System: Version 2.0. Minneapolis, MN: University of Minnesota 2011."
scale: "5"
colors: YlGn
"y-format": ","
notes: ""
---

Each decade since 1970 has seen an increase in the number of occupied units, while number of vacant units has fluctuated.
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