Regional totals;Period;Total
National Total;2024;96.10
National Total;2023;96.11
National Total;2022;96.24
National Total;2021;96.26
National Total;2020;96.28
National Total;2019;96.30
National Total;2018;96.36
National Total;2017;96.47
National Total;2016;96.59
National Total;2015;96.69
National Total;2014;96.84
National Total;2013;97.10
National Total;2012;97.39
National Total;2011;97.59
National Total;2010;97.78
National Total;2009;97.95
National Total;2008;97.89
National Total;2007;97.59
National Total;2006;97.44
National Total;2005;97.15
National Total;2004;96.77
National Total;2003;96.51
National Total;2002;96.16
National Total;2001;96.06
National Total;2000;96.04
National Total;1999;96.04
National Total;1998;96.02
National Total;1997;96.02
National Total;1996;96.02
National Total;1995;96.03
National Total;1994;96.02
National Total;1993;96.00
National Total;1992;95.99
National Total;1991;95.99
National Total;1990;96.10
National Total;1989;96.18
National Total;1988;96.25
National Total;1987;96.30
National Total;1986;96.34
National Total;1985;96.37
National Total;1984;96.39
National Total;1983;96.39
National Total;1982;96.38
National Total;1981;96.35
National Total;1980;96.32
National Total;1979;96.28
National Total;1978;96.22
National Total;1977;96.14
National Total;1976;96.07
National Total;1975;95.97