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diff --git a/boost/units/base_units/metric/year.hpp b/boost/units/base_units/metric/year.hpp
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+// Boost.Units - A C++ library for zero-overhead dimensional analysis and
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2007-2008 Steven Watanabe
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_UNIT_SYSTEMS_OTHER_YEAR_HPP_INCLUDED
+#define BOOST_UNIT_SYSTEMS_OTHER_YEAR_HPP_INCLUDED
+
+#include <boost/units/scaled_base_unit.hpp>
+#include <boost/units/static_rational.hpp>
+#include <boost/units/scale.hpp>
+#include <boost/units/base_units/si/second.hpp>
+
+// Julian year = 365.25 days exactly = 8766 hours exactly
+
+namespace boost {
+namespace units {
+namespace metric {
+
+typedef scaled_base_unit<boost::units::si::second_base_unit, scale<31557600, static_rational<1> > > year_base_unit;
+
+}
+
+template<>
+struct base_unit_info<metric::year_base_unit> {
+ static const char* name() { return("Julian year"); }
+ static const char* symbol() { return("yr"); }
+};
+
+}
+}
+
+#endif