Regional totals;Period;Total
National Total;2024;142.35
National Total;2023;137.33
National Total;2022;133.64
National Total;2021;129.16
National Total;2020;125.82
National Total;2019;123.00
National Total;2018;120.56
National Total;2017;118.36
National Total;2016;116.33
National Total;2015;114.69
National Total;2014;112.63
National Total;2013;109.89
National Total;2012;108.34
National Total;2011;107.35
National Total;2010;106.12
National Total;2009;105.26
National Total;2008;105.25
National Total;2007;106.34
National Total;2006;107.39
National Total;2005;106.93
National Total;2004;108.15
National Total;2003;109.16
National Total;2002;109.03
National Total;2001;106.48
National Total;2000;103.33
National Total;1999;99.88
National Total;1998;95.46
National Total;1997;90.81
National Total;1996;86.18
National Total;1995;81.38
National Total;1994;76.78
National Total;1993;72.54
National Total;1992;68.63
National Total;1991;64.77
National Total;1990;60.96
National Total;1989;57.51
National Total;1988;54.34
National Total;1987;51.35
National Total;1986;48.85
National Total;1985;46.74
National Total;1984;45.15
National Total;1983;43.56
National Total;1982;42.09
National Total;1981;40.85
National Total;1980;39.47
National Total;1979;38.26
National Total;1978;37.35
National Total;1977;36.50
National Total;1976;35.82
National Total;1975;34.99