Researchers in R&D (per million people) United States USA 2025 0 Researchers in R&D (per million people) United States USA 2024 0 Researchers in R&D (per million people) United States USA 2023 0 Researchers in R&D (per million people) United States USA 2022 4937.49441 0 Researchers in R&D (per million people) United States USA 2021 4900.77179 0 Researchers in R&D (per million people) United States USA 2020 4567.79267 0 Researchers in R&D (per million people) United States USA 2019 4367.20971 0 Researchers in R&D (per million people) United States USA 2018 4322.78826 0 Researchers in R&D (per million people) United States USA 2017 4020.59227 0 Researchers in R&D (per million people) United States USA 2016 3897.11007 0 Researchers in R&D (per million people) United States USA 2015 3949.66371 0 Researchers in R&D (per million people) United States USA 2014 3915.0339 0 Researchers in R&D (per million people) United States USA 2013 3815.20951 0 Researchers in R&D (per million people) United States USA 2012 3734.6577 0 Researchers in R&D (per million people) United States USA 2011 3754.88228 0 Researchers in R&D (per million people) United States USA 2010 3643.92768 0 Researchers in R&D (per million people) United States USA 2009 3877.89208 0 Researchers in R&D (per million people) United States USA 2008 3751.46069 0 Researchers in R&D (per million people) United States USA 2007 3624.05411 0 Researchers in R&D (per million people) United States USA 2006 3674.19384 0 Researchers in R&D (per million people) United States USA 2005 3635.29099 0 Researchers in R&D (per million people) United States USA 2004 3710.14634 0 Researchers in R&D (per million people) United States USA 2003 3851.4654 0 Researchers in R&D (per million people) United States USA 2002 3645.74808 0 Researchers in R&D (per million people) United States USA 2001 3598.59475 0 Researchers in R&D (per million people) United States USA 2000 3556.3917 0 Researchers in R&D (per million people) United States USA 1999 3547.1262 0 Researchers in R&D (per million people) United States USA 1998 3472.48581 0 Researchers in R&D (per million people) United States USA 1997 3310.87683 0 Researchers in R&D (per million people) United States USA 1996 3206.67656 0 Researchers in R&D (per million people) United States USA 1995 0 Researchers in R&D (per million people) United States USA 1994 0 Researchers in R&D (per million people) United States USA 1993 0 Researchers in R&D (per million people) United States USA 1992 0 Researchers in R&D (per million people) United States USA 1991 0 Researchers in R&D (per million people) United States USA 1990 0 Researchers in R&D (per million people) United States USA 1989 0 Researchers in R&D (per million people) United States USA 1988 0 Researchers in R&D (per million people) United States USA 1987 0 Researchers in R&D (per million people) United States USA 1986 0 Researchers in R&D (per million people) United States USA 1985 0 Researchers in R&D (per million people) United States USA 1984 0 Researchers in R&D (per million people) United States USA 1983 0 Researchers in R&D (per million people) United States USA 1982 0 Researchers in R&D (per million people) United States USA 1981 0 Researchers in R&D (per million people) United States USA 1980 0 Researchers in R&D (per million people) United States USA 1979 0 Researchers in R&D (per million people) United States USA 1978 0 Researchers in R&D (per million people) United States USA 1977 0 Researchers in R&D (per million people) United States USA 1976 0