| Year | Value | | 2024 | 40,623,017 | | 2023 | 40,729,354 | | 2022 | 40,754,978 | | 2021 | 40,439,671 | | 2020 | 40,252,816 | | 2019 | 39,952,678 | | 2018 | 40,193,292 | | 2017 | 39,720,340 | | 2016 | 39,822,992 | | 2015 | 40,014,953 | | 2014 | 39,964,948 | | 2013 | 39,678,084 | | 2012 | 40,844,641 | | 2011 | 40,584,009 | | 2010 | 39,244,294 | | 2009 | 39,417,409 | | 2008 | 38,956,147 | | 2007 | 38,462,735 | | 2006 | 37,763,306 | | 2005 | 37,547,753 | | 2004 | 37,027,471 | | 2003 | 36,508,323 | | 2002 | 36,099,014 | | 2001 | 35,675,006 | | 2000 | 35,043,427 | | 1999 | 34,321,472 | | 1998 | 34,215,184 | | 1997 | 33,951,789 | | 1996 | 33,301,528 | | 1995 | 32,519,848 | | 1994 | 31,715,702 | | 1993 | 31,082,896 | | 1992 | 30,417,175 | | 1991 | 29,717,052 | | 1990 | 28,991,298 |
|