Figure 1. Voluntary and involuntary part-time workers as a percentage of total employment
Year Voluntary part-time workers Involuntary part-time workers

1994

14.9 2.8

1995

14.8 2.6

1996

14.6 2.4

1997

14.6 2.2

1998

14.6 1.9

1999

14.6 1.7

2000

14.3 1.5

2001

14.2 1.7

2002

14.3 2.0

2003

14.3 2.3

2004

14.4 2.2

2005

14.3 2.1

2006

14.1 1.9

2007

14.0 2.0

2008

13.8 2.6

2009

13.8 4.5

2010

13.6 5.0

2011

13.6 4.9

2012

13.7 4.7

2013

13.6 4.5

2014

13.8 4.0

2015

13.9 3.5

2016

14.1 3.1

Note: Excludes a small number of part-time workers who did not work during the reference week.

Source: U.S. Bureau of Labor Statistics, Current Population Survey.