| DATE | PPAAUS00000A156NCEN | |||
| 1/1/1989 | 1989 | 12.8 | ||
| 1/1/1990 | 1990 | . | ||
| 1/1/1991 | 1991 | . | ||
| 1/1/1992 | 1992 | . | ||
| 1/1/1993 | 1993 | 15.1 | ||
| 1/1/1994 | 1994 | . | ||
| 1/1/1995 | 1995 | 13.8 | ||
| 1/1/1996 | 1996 | 13.7 | ||
| 1/1/1997 | 1997 | 13.3 | ||
| 1/1/1998 | 1998 | 12.7 | ||
| 1/1/1999 | 1999 | 11.9 | ||
| 1/1/2000 | 2000 | 11.3 | ||
| 1/1/2001 | 2001 | 11.7 | ||
| 1/1/2002 | 2002 | 12.1 | ||
| 1/1/2003 | 2003 | 12.5 | ||
| 1/1/2004 | 2004 | 12.7 | ||
| 1/1/2005 | 2005 | 13.3 | ||
| 1/1/2006 | 2006 | 13.3 | ||
| 1/1/2007 | 2007 | 13 | ||
| 1/1/2008 | 2008 | 13.2 | ||
| 1/1/2009 | 2009 | 14.3 | ||
| 1/1/2010 | 2010 | 15.3 | ||
| 1/1/2011 | 2011 | 15.9 | ||
| 1/1/2012 | 2012 | 15.9 | ||
| 1/1/2013 | 2013 | 15.8 | ||
| 1/1/2014 | 2014 | 15.5 | ||
| 1/1/2015 | 2015 | 14.7 | ||
| 1/1/2016 | 2016 | 14 | ||
| 1/1/2017 | 2017 | 13.4 | ||
| 1/1/2018 | 2018 | 13.1 | ||
| 1/1/2019 | 2019 | 12.3 | ||
| 1/1/2020 | 2020 | 11.9 | ||
| 1/1/2021 | 2021 | 12.8 | ||
| 1/1/2022 | 2022 | 12.6 | ||